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Videos uploaded by user “UK CB radio servicing”
CB dummy Load project - Servicing CB radio on a shoestring budget - Pt1
 
04:45
Richard Shireby discusses & demonstrates how to make a 50 ohm dummy load to enable transmitter tests & adjustments to be made on CB radios. Just requires two 100 ohm 5Watt resistors, a PL259 plug & a bit of sleeving. Make sure you're not using wirewound resistors. Test books tell you to only use carbon resistors, but these are metal oxide & I can't see a snag. Technology moves forward & components get better!
Views: 5158 UK CB radio servicing
Vinyl record cleaning the Ultrasonic way - Making the unplayable sound great again
 
09:18
Richard Shireby (UK) discusses & demonstrates a multi method technique of vinyl record cleaning. Firstly running the record through a Knosti Disco Antistat (other similar products available), then 2 mins into an ultrasonic cleaner, jet washing with distilled water using an automotive parts washer, then into a second Knosti Disco Antistat (obviously cleaner than the first!), then rinse off back in the automotive parts washer & dry naturally in the Knosti drying rack. Standard formula of fluid to make up 1 Litre, 80% distilled water, 20% Isopropyl alcohol & 5ml of photographic wetting agent. We use both Kodak & Ilford product with equal success. If I were into 78rpm records then it would just be distilled water & wetting agent as the isopropyl would affect the shellac.
Views: 6915 UK CB radio servicing
Midland 76-900, UK (CB 27/81) CB radio (Base Station) - On The Air Test
 
03:02
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates alignment of the Midland 76-900 base station CB radio, costing a whopping £369 in 1982 & utilising the popular Cybernet PTBM134AOX chassis.
Views: 6235 UK CB radio servicing
President Grant II Mk2, UK/EU (CE-Multi) AM/FM/SSB CB Radio (Mobile) - Overview & field test
 
12:20
Richard Shireby, G0OJF & Mark Burns, G7NDJ, discuss & demonstrate the President Grant II Mk2 SSB CB radio. SSB with the appropriate CE approved transceivers became legal in the UK yesterday, the 27th June 2014. After a quick check on FM into the test equipment, we did a quick field test with myself staying here & Mark going to a well known radio dead spot 6 miles away, thus making the radios seem further away than they were in reality. The tests worked very well. I will look forward to optimising this radio later in the year when the full service manual appears from President.
Views: 13384 UK CB radio servicing
Measuring RF Output power on CB radios - Servicing CB radio on a shoestring budget pt2
 
07:53
Richard Shireby (UK) discusses & demonstrates the use of cheap test equipment to measure the RF power output on UK legal cb radio equipment & shows the use of an ammeter either built into a power supply or applied externally to a cheap power supply. Demonstration shows customers Fidelity 1000 CB radio repair now doing 3W rather than the 500mW it came in for repair generating. Apologies for poor continuity between day 1 initial recording & day 2 finishing this video. The radio came in doing 500mW, & got a faulty part changed so it then produced 2W....I recorded the first bit in the audio workshop. Next day I went into the RF workshop to record pt2 & found Mr Chippie had finished the faulty radio with a full retune, so it was then doing 2.9W. I wasn't expecting that, but hadn't told him that the Fidelity 1000 repair was part of my video!
Views: 3516 UK CB radio servicing
Fidelity CB1000, UK (CB 27/81) CB radio (Mobile) -  repair & vco
 
14:10
Richard Shireby, G0OJF, from TSG Communications, Lincolnshire, UK, discusses & demonstrates the alignment procedure of the Fidelity CB1000FM (UK) CB radio from 1981. This particular set is a scrap set from stock, being repaired & aligned for the purpose of this demonstration. These sets, made by Great of Taiwan, use an unusual synthesiser chip. The Fidelity CB1000 is the only radio that uses the GT848 chassis. Other badged Great chassis models such as the Lake 850, use the GT858 chassis which is the same but with no Ext speaker socket, and other models such as the Lake 950 use the GT868 chassis, which simply has more knobs on the radio & PA facility. After getting the radio to initially work, I show you the VCO adjustment. I was unable to set up the TX VCO with a meter, so show a logic probe in use instead. However, on RX couldn't get a reading on the logic probe, but could on the meter! The service manual says to set the VCO with an oscilloscope, so I move the radio from our usual test bench no.2, to test bench no.3 to demonstrate the oscilloscope method. However, seeing as only test bench 2 is video equipped, I have to show you procedures with a hand held camcorder instead....don't get sea sick! I bought this scrapper from a local radio ham rally for £2
Views: 1191 UK CB radio servicing
Audioline 341,  UK (27/81 band) CB radio (Mobile). Receiver Alignment
 
07:08
Richard Shireby, G0OJF, from TSG communications, Grantham, Lincolnshire, UK, demonstrates correct alignment procedure for the Audioline 341 (Uniden) CB radio from 1981. This radio had come in for repair & service. I suspect it came from a car boot sale or an Ebay "spares or repairs" special, considering the loudspeaker was missing. Fault turned out to be 4 broken flexi-track wires between the channel selector PCB & the main board, caused by missing securing nut from the channel selector switch - putting strain on the flexitrack. After repair & re-alignment, this 32 year old CB radio worked very well indeed.
Views: 1684 UK CB radio servicing
Thunderpole T1000, UK/EU (CE-Multi) 80-channel CB Radio (Mobile) - On The Air Test
 
03:45
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire discusses & demonstrates the alignment of the Thunderpole T10000 CE Multi CB radio. This chassis is used in several current radios & the board is labelled "M120", therefore indicating to my mind that the Intek M-120 is the radio intended for this chassis. Other than an annoying whistle generated by the radios VCO, the radio seems to work very well indeed. It came out of the box at 2.7W & 1.7khz deviation, soon adjusted to more correct levels. I was unable to bring the transmit above 3.6W....but bear in mind our commercial test sets read real watts rather than good buddy watts, so that probably equated to about 6W on a good buddy meter!
Views: 3308 UK CB radio servicing
Fidelity 3000, UK (CB 27/81) CB radio (Base Station)   -  On The  Air Test
 
04:35
Richard Shireby, G0OJF, from TSG communications, Lincolnshire, UK demonstrates alignment procedure as per service manual for this 1981 base station transceiver. Be warned that the FM discriminator & the IF section require use of a Sweep Generator
Views: 2967 UK CB radio servicing
Bremi BRS27 3A CB power supply (c1981). Overhaul & repair
 
07:27
Richard Shireby discusses & demonstrates the overhaul & repair on the Bremi BRS27 CB power supply. I forgot to mention in the video that (obviously) I replaced the terminals on the front of the unit as the red & black terminals were actually missing. I had to drill the holes out slightly to accommodate the replacements that I got from Hong Kong via Ebay.
Views: 1097 UK CB radio servicing
Rotel RVC240 UK (CB27/81) CB radio (mobile)  - repair, vco & transmit
 
17:24
Richard Shireby, G0OJF, discusses & demonstrates the repair, VCO setting & transmit alignment of the Rotel RVC240 UK CB FM radio from 1981. I bought this radio as a non worker off ebay & soon discovered the fault lay in the illegal 80-channel bodge board that that had been fitted at one time. Removal of the illegal modification & installation of a new Sanyo LC7137 synthesiser chip plus two missing capacitors restored normal operation. I then had to rewire the delta tune switch that had been turned into something else unknown & also rewire the CB/PA switch back to it's correct function after being turned into the switch to select the illegal modification. I just need to replace the meter lamp now!
Views: 1298 UK CB radio servicing
Midland 3001, UK (CB 27/81) CB radio (Mobile) - On The Air Test
 
04:04
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire (UK) discusses & demonstrates the alignment of the Midland 3001 CB radio, manufacured in 1982 by Maxon in Korea.
Views: 2883 UK CB radio servicing
Grandstand Base Station, UK (CB 27/81) CB radio (Base Station) - On The Air Test
 
02:06
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates alignment of the Grandstand base station, manufactured in Japan by Suruga in 1981. Capable of good results, these unusual sets can be a pig to set up correctly, not helped by lack of service information. I do have a circuit, luckily...but that's all. The NEC made UPD2812C synthesiser IC that these sets use was already obsolete when these sets were made. I assume that Suruga had bucket loads of them to use up! The tape recorder output socket on the back is a great feature. Reliability can sometimes be a let-down on these rigs because of the double sided PCB being linked through with ordinary tin plated wire, this goes dry joint...usually under the wax-filled IF/synth screening can. You can spend some happy time with a hair dryer trying to get enough of the wax out to fault find! The following is a link to a conversation I had with The Electric Man, thereby demonstrating the transmitted audio of this radio. 36Bxm3yfnPk
Views: 2388 UK CB radio servicing
York JCB863, UK (CB 27/81) CB radio (Mobile)  - On The Air Test
 
02:26
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire (UK) discusses & demonstrates the allignment as per manufacturers service manual of the York JCB863 CB radio from 1981. This high end radiio uses the Cybernet 134 chassis. This radio came in with no Transmit caused by an open circuit transmitter driver transistor, no doubt caused by being used with an aerial with a hifg SWR. The radio also had no transmitted audio caused by a dirty mic gain control.
Views: 1457 UK CB radio servicing
Grandstand Gemini, UK (CB 27/81) CB radio (Mobile) - On The Air Test
 
03:29
Richard Shireby, G0OJF, from TSG Communications, Lincolnshire, UK, discusses & demonstrates the alignment procedure of the Grandstand Gemini UK CB radio from 1981. This Japanese made radio is the same chassis as the Grandstand Base Station & therefore also uses the long obsolete general purpose PLL chip from NEC, the UPD2912C. The unusual chassis is capable of good results, but now over 30 years old can suffer from dry joints between the sides of the double sided PCB's. The other side of this conversation recorded by The Electric Man is here:- https://www.youtube.com/watch?v=krfCXJmAIGw&feature=youtu.be
Team TS6M, UK/EU (CE-Multi) 80-channel CB Radio (Mobile) - On The Air  test
 
02:55
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire discusses & demonstrates the alignment of the Team TS6M CE Multi CB radio. Fibreglass PCB & what appears to be a true auto squelch, rather than simply a preset one - though we don't have a full service manual to prove this. The radio easily achieved the full 4W of transmit power too. The last 15 seconds shows the transmitted audio as received on another radio with the RF gain down, elsewhere in the building. A far better recording of the TX audio is now on The Electric Man's Youtube channel at 6AnTIVKz53U
Views: 3735 UK CB radio servicing
Fidelity 2001, UK (CB 27/81) CB radio (Mobile) - repair & VCO
 
19:07
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates the repair & alignment of a very tatty, incomplete & water damaged Fidelity 20001 UK CB radio from 1981. Intending to produce this video with one of half a dozen of these sets that came in for service work last week, I discovered the other engineers here had done them all & sent them back. Then I remembered this set that I bought from a radio rally for £2. Could it be got working again despite severe water damage & parts missing? Yes, it could.....and works very well indeed. Clearly the original fault before being previously discarded was a faulty LA1230 IF subsystem IC.
Views: 3864 UK CB radio servicing
Altai 3-5A 13.8V CB power supply overhaul. 1981 Taiwan version
 
07:54
Richard Shireby & Mr Chippie discuss & demonstrate overhaul, modification for safety & repair of the Altai 3-5A 13.8V CB power supply. These were made in Taiwan around 1981 & got banned for safety reasons. These & other units under various names are very reliable & can soon be brought up to safety standards with a little rewiring & replacing the fuseholder. We changed the three electrolytics as well.
Views: 1333 UK CB radio servicing
TTI TCB900  UK (CE Multi-norm) CB radio (mobile) - Transmit adjustment
 
09:21
Richard Shireby, G0OJF (Lincolnshire, UK) discusses & demonstrates transmit adjustment on the TTI TCB900 Multi-Norm CB radio. Mark G7NDJ is lurking in the background too. Sorry about the poor editing around 5:38. I missed that one!
Views: 1204 UK CB radio servicing
CB radio servicing on a shoestring budget Pt4 - FM deviation  (UK)
 
11:45
Richard Shireby concludes the Transmit side of this series of videos "CB radio servicing on a shoestring budget" with setting the deviation. In AM terms the transmitted audio is referred to as Modulation, with FM it us Deviation. Here we have an old clonker of a Marconi deviation meter from 1961 & full of valves. I bought it off ebay for this demonstration & in working order with manual too! I've never before seen a test instrument connected like this, but always through either an attenuator pad or just with a sniffer antenna. Always connect as per the instruction manual. This instrument requires 4-10W drive, is all valve & was no doubt made for some military application. There is an output terminal that can be connected to an oscilloscope to monitor the transmitted audio waveform.
Views: 1056 UK CB radio servicing
BSR & Garrard record turntable lubrication & adjustment
 
18:49
Richard Shireby, G0OJF discusses & demonstrates lubrication & adjustment of a BSR autochanger record deck. Many BSR & Garrard models are treated in exactly the same way. Stylus tracking pressure adjustment is then demonstrated after a new stylus is fitted.
Views: 14310 UK CB radio servicing
Midland 2001, UK (CB 27/81) CB radio (Mobile) - On The Air Test
 
04:22
Richard Shireby, G0OJF, from TSG Communications, Lincolnshire, UK, discusses & demonstrates the correct alignment procedure of the Midland 2001. What can I say? they just plod on working. The Electric Man has uploaded a video of his side of this conversation for you to hear my transmission. e5M3krqqCqE
Views: 2718 UK CB radio servicing
Midland 48 Plus Multi  - UK CB radio, (CE Multi) (Mobile).  Transmit alignment
 
08:55
Richard Shireby, G0OJF, from TSG Communications, Lincs. UK, demonstrates the alignment of the Midland 48 Plus Multi. This was a request for us to supply & oprimise this radio. Not having seen this version before & our circuits & layouts turned out to be for a schedule 1 radio...and this was a schedule 5! Anyway, I found my may around it & made notes for future reference. The only niggle I have is that after pressing the PTT switch, it takes about half a second to actually go into transmit. However, I've noticed this is the same on quite a few latest models.
Views: 6033 UK CB radio servicing
HMV Stereomaster 2419   pt2, duff speakers & amplifier capacitors changed
 
10:27
Part 2 of 3 of the HMV Stereomaster 2419 overhaul
Midland 76-300, UK (CB 27/81) CB radio (Base Station) - On The Air Test
 
03:14
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates alignment of the mega rare Midand 76-300 UK (28/81) base station CB radio. I bought this off Ebay about 18 months ago & had never seen one before....or since.
Views: 1415 UK CB radio servicing
Fidelity 3000, UK (CB 27/81) CB radio (Base Station) - VCO & Transmitter alignment
 
19:19
Richard Shireby, G0OJF, from TSG communications, Lincolnshire, UK demonstrates alignment procedure as per service manual for this 1981 base station transceiver. Be warned that the FM discriminator & the IF section require use of a Sweep Generator
Views: 1173 UK CB radio servicing
Harvard 402MPA (H160) UK (CB27/81) CB radio (mobile) - VCO & Transmit
 
16:11
Richard Shireby (G0OJF) at TSG Communications near Grantham in Lincolnshire starts work on a faulty Harvard 402MPA CB radio from 1981. This radio was sent in by one of the subscribers, John, who bought it on Ebay as a worker, which it most certainly isn't....especially on receive. Thanks John! Starting with fitting a power socket & new power lead, and fitting the correct 3R3 5W resistor in the transmit circuit, I then reset the VCO which was so far out that TX wasn't possible on the lower channels. Radio set up very nicely indeed with a full 4W of RF power output; makes a change from the rigs that only manage 1.7! The real work is on the next video in repairing the receiver.
Fidelity 2001, UK (CB 27/81) CB radio (Mobile) -  On The Air Test
 
03:11
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates the repair & alignment of a very tatty, incomplete & water damaged Fidelity 20001 UK CB radio from 1981. Intending to produce this video with one of half a dozen of these sets that came in for service work last week, I discovered the other engineers here had done tham all & sent them back. Then I remembered this set that I bought from a radio rally for £2. Could it be got working again despite severe water damage & parts missing? Yes, it could.....and works very well indeed. Clearly the original fault before being previously was a faulty LA1230 IF subsystem IC.
Views: 1670 UK CB radio servicing
Amstrad CB901 (made in Japan version), UK (CB 27/81) CB radio (Mobile)  - Transmit adjustment
 
07:27
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates servicing & repair of the Amstrad CB901 UK CB radio. This is the genuine "made in Japan" version that retailed for £89.99 back in 1981. Utilising the Cybernet PTBM002F chassis, these sets work very well when set up properly & have excellent receive sensitivity....certainly better than most new sets of today! For this demonstration, I bought this radio from a Amateur Radio Rally for £2.70. On the service bench it was clear to me that the set had suffered from having power applied with reverse polarity & clearly no fuse in the installation. Repair consisted of replacing the LA4422 audio amplifier IC, the LA1230 IF FM subsystem IC & the BA656 bargraph display driver....so not a cheap repair!
Views: 1401 UK CB radio servicing
Amstrad CB901 (made in Japan version) UK (CB27/81) CB radio (mobile) -   On The Air test
 
06:14
Richard Shireby discusses & demonstrates the Japanese build version of the Amstrad CB901 1981 CB27/81 UK FM 40-channel CB radio. This radio had come in for service so I took the opportunity to record one of our standardised "on the air" videos, where as usual I talk to Mr Chippie as he drives 7 miles in the "wrong" direction from here. Wrong...because it's bad terrain for radio & the wrong side of a hill. The radio worked fine which is more than can be said of some of the current radios we test.
Views: 1530 UK CB radio servicing
Fidelity CB1000, UK (CB 27/81) CB radio (Mobile) - Receive & IF alignment
 
10:11
Richard Shireby, G0OJF, from TSG Communications, Lincolnshire, UK, discusses & demonstrates the alignment procedure of the Fidelity CB1000FM (UK) CB radio from 1981. This particular set is a scrap set from stock, being repaired & aligned for the purpose of this demonstration. These sets, made by Great of Taiwan, use an unusual synthesiser chip. The Fidelity CB1000 is the only radio that uses the GT848 chassis. Other badged Great chassis models such as the Lake 850, use the GT858 chassis which is the same but with no Ext speaker socket, and other models such as the Lake 950 use the GT868 chassis, which simply has more knobs on the radio & PA facility. In this video, the alignment of the 455Khz IF is achieved using a sweep generator; vital to servicing this chassis owing to the unusual & simplistic FM detector arrangement.
DNT M40  UK (CB27/81) CB radio (Mobile)  -  Transmit Alignment
 
07:55
Richard Shireby, G0OJF, from TSG Comms (Lincs, UK), demonstrates the multi crystal setup & transmit lineup on the 1981 DNT M40 UK 27/81 MPT1320 FM CB radio. These were made by RCH in Hong Kong.
Midland 77-805 Port-A-Pack, UK (CB 27/81) CB radio (Transportable) - Transmitter alignment
 
06:26
Richard Shireby, G0OJF, from TSG communications, Lincolnshire, UK demonstrates alignment procedure for the Midland 77-805 Port-A-Pack, as requested by Paul. These were made in 1986.
Grandstand P2004, UK CB radio 2W, 4-channel (Hand portable). On The Air Test
 
02:21
Richard Shireby, G0OJF, from TSG Communications, Lincolnshire, UK, discusses & demonstrates the alignment of the Grandstand P2004 4-channel, 2W, crystal controlled hand-portable FM UK CB radio. This is from my personal collection of UK CB's & I have only ever seen one other of these. Unfortunately I don't even have a circuit diagram or a copy of the user manual. Made by Hokuto, Japan, in 1981. These radios are unusually high quality. The four channels fitted are 2, 14, 21 & 39. This on the air test was done using the radio on rechargeable batteries with the radio plugged into the roof aerial of the workshop. Despite foreign interference I still managed a 2-way conversation with The Electric Man 8.8 miles away in the town of Grantham. Bearing in mind this radio is 1W to the antenna, the video below is the other side of this conversation from The Electric Man. http://youtu.be/hoGSJyLkwJ4
Harrier CBHQ (UK) CB Radio (CB27/81) Base - Repair & VCO adjustment
 
08:37
Richard Shireby discusses & demonstrates a repair & power supply overhaul to a Harrier CBHQ base station from 1981. The VCO is then set up as per the service manual for correct lock on both transmit & receive for the radio's frequency change.
Icom ICB1050,  UK (27/81 band) CB radio (Mobile). On the air test.
 
03:07
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire, UK, demonstrates the correct alignment procedure on the Icom ICB-1050 - not to be confused as being anything to do with "the real" Icom company! These budget Hong Kong made sets from 1981 can perform well on transmit, though the receive was prone to 'bleedover' from adjacent channels. However, these days with far less users on, that particular snag shouldn't be a problem, especially if the rig is used mobile. These radios are pigs to set up because of the 3-crystal synthesiser arrangement using the general purpose Motorola MC145151 chip, rather than the better & more usual arrangement provided by UK dedicated chips with their double masked ROM's. Because of the general purpose synthesiser, it's only a matter of swapping a couple of wires over, putting in a couple of links & adding a 10K resistor for these transceivers to go straight on the 28Mhz radio amateur band. Unfortunately there were very many failures owing to both incompetence & lack of test equipment, so there used to be plenty of these sets around in a "scrap" condition. The radio in this video was really a scrap set & hours of painstaking work putting more than a dozen new parts in the transmitter section owing to the previous owner trying to fit the wrong output transistor of a more powerful type. No doubt it managed 7 watts for a few minutes until various parts in the transmit driver circuit burnt out. Other snags in the synthesiser power regulator, the channel selector board & the receiver also had to be dealt with. Many of the coil cores were broken & luckily I had a scrap chassis to hand enabling me to replace these long unavailable parts for this 30 year old set. Phew!
Maxcom 4E, UK (CB 27/81) CB radio (Mobile) - VCO & Transmit
 
14:28
Richard Shireby, G0OJF, from TSG communications, Lincolnshire, UK demonstrates the alignment procedure as per the manufacturers instructions of the Maxcom 4E. This Maxon produced chassis found it's way into many different radios at the time (1982) such as the Midland 2001, 3001, 4001, Colt 295, Cobra 21XFM, Sirtel Searcher, Comtron CB40F & even one of the Midland base stations. Although it was well known for the receiver section to suffer badly from adjacent channel de-sensing, these days this is no longer a problem as there aren't ten CB setups per street any more! Bizarrely, there is no S-meter preset on this version & on this sample S9= 600uV, rather than the normal 100uV., however, this is how these rigs are and it's a very minor niggle.
Views: 1406 UK CB radio servicing
Audioline PT345, UK (CB 27/81) CB radio (Base Station) - On The Air Test
 
03:20
Richard Shireby, G0OJF, from TSG communications, Lincolnshire, UK demonstrates alignment procedure of the Audioline PT345 base station. Unfortunately the radio had suffered from an illegal modification to add CEPT channels onto it. These modifications always end up compromising performance on both sets of channels and are of course illegal as well......and pointless these days as 80-channel CE approved legal sets are readily & cheaply available. After restoration to factory standard & replacement of the 220uf capacitor in the synthesiser power rail, the radio was serviceable. Swapping two coils from a scrap chassis we had (Realistic TRC2000) enabled full performance tro be restored. Re-wiring the CB/PA switch completed the job owing to this switch having been utilised within the illegal modifications. These are nice sets & were expensive at the time. They also work well. No, the display on the radio is working fine...the segments that appear missing are an optical illusion caused by the electronic shutter on the camera!
Views: 1185 UK CB radio servicing
Midland 3001, UK (CB 27/81) CB radio (Mobile) - Receive Alignment
 
06:14
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire (UK) discusses & demonstrates the alignment of the Midland 3001 CB radio, manufacured in 1982 by Maxon in Korea.
Harrier CBX UK (CB27/81) CB radio (mobile)    VCO & Transmit
 
14:47
Richard Shireby discusses & demonstrates VCO & transmitter alignment on a customer's Harrier CBX UK FM CB radio which was manufactured in 1981. These are Japanese built by Cybernet & use their 134 chassis with an LC7137 (sanyo) synthesiser
Harrier CBHQ (UK) CB27/81 CB radio (base) - On The Air test
 
06:57
Richard Shireby & Mr Chippie demonstrate the fully serviced Harrier CBHQ base station UK FM CB radio from 1981. As usual in this standardised test, Mr Chippie drives 6.5 miles away the wrong side of a hill in our worst direction for CB radio. Though virtually unreadable at two of the check-in points we never lost contact with each other; which is more than can be said for many radios we test on exactly the same way. It was a day with about S4 of noise which I'm sure didn't help. Anyway, a jolly good base station!
Harvard 420M UK CB radio. Alignment of Transmitter
 
17:59
Triggered by a request from my friend Mr Charles in Swansea, three Harvard 420M 1981 UK CB radios are on the shelf awaiting servicing. Selecting the earliest...and most rusty, I go through the repair & alignment of yet another guise of the popular (at the time) & good performing Cybernet PTBM134AOX chassis from Japan. I soon discover the radio is only transmitting at 1.7W & repair & realignment swiftly bring this back to the correct 4 watts. I discover the transmitted deviation is slightly low, the RF meter reads well over the top, the low power switch is inoperative & the meter bulb burnt out. Moving over to the receiver, the basic alignment is OK, but the FM detector is quite a way out which would cause receive distortion & the S meter is "Lazy". Then it's time to pop it back onto frequency as it had drifted down. After that there was just the rusty case to rub down & respray before final test on the air (another vvideo!), and getting it back to the no doubt pleased customer.
Views: 1896 UK CB radio servicing
Moonraker Major - UK CB radio, (CB 27/81) (Mobile) -  On The Air Test
 
04:34
Richard Shireby, G0OJF, from TSG communications, Grantham, Lincolnshire dicusses the alignment of the Moonraker Major CB radio from 1989. This radio sent me on a merry song & dance having got the wrong transistor...totally wrong...in the transmit output stage. This had caused the burn out of several resistors including one not on the circuit! Looking at similarly positioned resistors in the manuals of other radios enabled me to take an educated guess, & hey presto...the transmitter now works. Unfortunately the meter on the rig doesn't so I'll now have to look into that, and the master oscillator crystal is too far out of spec, so that needs sorting out too..not to mention the factory original mike...neatly wired wrongly! This rig has a built in SWR meter which is very unusual for a UK legal set. CB a bit quiet tonight at 8:30pm on Friday 28th Feb 2014 when this was recorded.
Views: 1193 UK CB radio servicing
Midland 48 Plus Multi  - UK CB radio, (CE multi) (Mobile) - On The Air Test
 
02:46
Richard Shireby, G0OJF, from TSG Communications, Lincs. UK, demonstrates the alignment of the Midland 48 Plus Multi. This was a request for us to supply & oprimise this radio. Not having seen this version before & our circuits & layouts turned out to be for a schedule 1 radio...and this was a schedule 5! Anyway, I found my may around it & made notes for future reference. The only niggle I have is that after pressing the PTT switch, it takes about half a second to actually go into transmit. However, I've noticed this is the same on quite a few latest models. Looks nicely made on a fibregalss Printed Circuit Board.
Views: 13803 UK CB radio servicing
Amstrad CB901(made in Japan version), UK (CB 27/81) CB radio (Mobile)  - Receive adjustment
 
06:02
Richard Shireby, G0OJF, from TSG Communications, Grantham, Lincs (UK), discusses & demonstrates servicing & repair of the Amstrad CB901 UK CB radio. This is the genuine "made in Japan" version that retailed for £89.99 back in 1981. Utilising the Cybernet PTBM002F chassis, these sets work very well when set up properly & have excellent receive sensitivity....certainly better than most new sets of today! For this demonstration, I bought this radio from a Amateur Radio Rally for £2.70. On the service bench it was clear to me that the set had suffered from having power applied with reverse polarity & clearly no fuse in the installation. Repair consisted of replacing the LA4422 audio amplifier IC, the LA1230 IF FM subsystem IC & the BA656 bargraph display driver....so not a cheap repair!
Views: 1282 UK CB radio servicing
Realistic TRC1007 - UK CB radio 3.5W, 40 channel (CB 27/81) (Hand portable). VCO & Transmit
 
19:32
Richard Shireby, G0OJF, from TSG Communications, Lincs. UK, demonstrates the alignment of the Realistic TRC1007 CB walkie talkie frrom 1988.
Uniden Uniace 100, UK (CB 27/81) CB radio (Mobile) - On The Air Test
 
03:00
Richard Shireby, G0OJF, from TSG Communications near Grantham in Lincolnshire (UK) discusses & demonstrates the alignment of the Uniden Uniace 100, UK CB radio from 1981. Not a lot I can say about these. As long as they've not been messed about with too much, they always work well.
Alba CBH2 - UK CB radio 2W, 40 channel (CB 27/81) (Hand portable).  On The Air Test
 
02:02
Richard Shireby, G0OJF, from TSG Communications, Lincs. UK, demonstrates the alignment of the Alba CBH2 2W 40 channel walkie talkie. This set came in with a broken antenna, some strange bodge around the transmit driver stages & inevitably, a burnt out RF outout transistor (MPSU31). Connected to the workshop aerial, the radio no works fine.
Views: 1045 UK CB radio servicing
Midland 78 Plus Multi Ver6 (UK)(CE) CB radio (mobile) -  RX adjustment
 
05:32
Richard Shireby (Grantham, Lincolnshire, UK) discusses & demonstrates receive adjustment on the Midland 78+ multi version 6 CB radio