Well rick after checking the voltages everything was spot on !
I have found the problem..it was the 100ohm resoistor that is mounted on the swr board next to the antenna socket..now the radio it working fine..it seems to be receiving better than my new ss3900 !
anyway thanks for your help rick..
73s
Search found 17 matches
- Thursday 17th Jul 2008, 10:43
- Forum: CB Radio Repair and Troubleshooting
- Topic: needle deflection.
- Replies: 3
- Views: 5777
- Wednesday 16th Jul 2008, 20:33
- Forum: CB Radio Repair and Troubleshooting
- Topic: needle deflection.
- Replies: 3
- Views: 5777
- Wednesday 16th Jul 2008, 7:43
- Forum: CB Radio Repair and Troubleshooting
- Topic: needle deflection.
- Replies: 3
- Views: 5777
needle deflection.
My cobra 148 gtl-dx mk 1 has got a serious problem. As soon as i switch the radio on the signal meter pings off the end of the scale ! the only way to stop it doing this is to move my swr cal switch ! Dont know where to start looking ! any hel would be great !
thanks in advance.
thanks in advance.
- Tuesday 24th Jun 2008, 20:32
- Forum: CB Radio Repair and Troubleshooting
- Topic: Cobra 148 gtl dx mk1
- Replies: 1
- Views: 4181
Cobra 148 gtl dx mk1
Hi all after about 10 years i decided to get the old cobra out and check if it still worked..it seems to be ok on FM but when i switch to SSB the audio output from the speacker is very low...and i have to put the volume control up past half way....and when i switch back to FM i have to turn the volu...
- Thursday 3rd Aug 2006, 4:23
- Forum: CB Radio Alignments
- Topic: cobra 148 gtl dx mk 2
- Replies: 2
- Views: 8322
- Wednesday 2nd Aug 2006, 4:35
- Forum: CB Radio Alignments
- Topic: cobra 148 gtl dx mk 2
- Replies: 2
- Views: 8322
cobra 148 gtl dx mk 2
Hi all.Can anyone tell me what the settings are for the bias of my output and driver.As i have lost my manual and i cant remember how many mv to set vr 10 and vr9 at.
My radio is a mk 2 late cobra 148gtl dx.
Thank's for any reply's...
My radio is a mk 2 late cobra 148gtl dx.
Thank's for any reply's...
pro 2006
Hi all. After some time of not getting swiched on my realistic pro 2006 scanner has developed a strange fault. Every 2 seconds or so the damn thing keeps on beeping and it has a batt thing flashing on the display all the time.I have put a new 9 volt battery in but made no difference at all. Please c...
- Tuesday 11th Jul 2006, 8:52
- Forum: CB Radio Repair and Troubleshooting
- Topic: 148 channel readout.
- Replies: 6
- Views: 11265
- Monday 10th Jul 2006, 4:52
- Forum: CB Radio Repair and Troubleshooting
- Topic: 148 channel readout.
- Replies: 6
- Views: 11265
- Monday 10th Jul 2006, 0:51
- Forum: CB Radio Repair and Troubleshooting
- Topic: 148 channel readout.
- Replies: 6
- Views: 11265
Thank's rick for the reply but my cobra is a mk1 with the pll mb8719.It is reading the correct frequency and the correct channel display..i.e.12=27.555 but then ch6 is also 27.555.
i am getting double frequencys on al 3 bands low mid and hi. on all modes.
Hope this helps a little bit.
thank's again.
i am getting double frequencys on al 3 bands low mid and hi. on all modes.
Hope this helps a little bit.
thank's again.
- Sunday 9th Jul 2006, 21:36
- Forum: CB Radio Modifications
- Topic: b525 switching transistor
- Replies: 7
- Views: 14131
Thank's for the info.I found a place in england (uk) that had Bd 136.Guess what they worked fine.Thanks for all the hel i got and thanks for the use of the forum.
http://www.bowood-electronics.co.uk/
http://www.bowood-electronics.co.uk/
- Sunday 9th Jul 2006, 21:09
- Forum: CB Radio Repair and Troubleshooting
- Topic: 148 channel readout.
- Replies: 6
- Views: 11265
148 channel readout.
Hi all.After some time i brought my early cobra148 gtl-dx down from the loft just to remanice the good old days.The radio was working fine before i put it in a box and up the loft.But now it has developed a problem with the channels they seem to be doubling up.What i mean is every 6 channels it repe...
- Sunday 2nd Jul 2006, 9:02
- Forum: CB Radio Alignments
- Topic: superstar 3900
- Replies: 5
- Views: 17130
superstar 3900
Hello to all,
can anyone tell me what is the best way to calibrate my ssb frequency on my superstar 3900 i have the plug in frequency counter. when it reads 27.555 every on tells me that i am of frequency.I am confused !can anyone help ?
thank's in advance...
can anyone tell me what is the best way to calibrate my ssb frequency on my superstar 3900 i have the plug in frequency counter. when it reads 27.555 every on tells me that i am of frequency.I am confused !can anyone help ?
thank's in advance...
- Sunday 25th Jun 2006, 21:41
- Forum: CB Radio Modifications
- Topic: b525 switching transistor
- Replies: 7
- Views: 14131
- Saturday 24th Jun 2006, 23:16
- Forum: CB Radio Modifications
- Topic: b525 switching transistor
- Replies: 7
- Views: 14131
- Saturday 24th Jun 2006, 20:10
- Forum: CB Radio Modifications
- Topic: b525 switching transistor
- Replies: 7
- Views: 14131
- Saturday 24th Jun 2006, 9:36
- Forum: CB Radio Modifications
- Topic: b525 switching transistor
- Replies: 7
- Views: 14131
b525 switching transistor
Hi all. Can any on tell me where to buy a replacement transistor for my mk1 cobra gtl-dx.I have tried my local radio store and the ones that they sell dont do the job ! Here is the part i am looking for...Swithching transistor B525..The mk1 cobra has 3 of these one of mine is down...i.e no output po...