Re: [Drakelist] MS-4 Speaker

FYI, Referred to in the autotrade as 'Stonechip' or 'Underbody Schutz' still available in spray cans. 73 Max M0GHQ - Original Message - From: K9sqg To: 1oldle...@ix.netcom.com ; bob.lov...@sbcglobal.net Cc: drakelist@zerobeat.net Sent: Wednesday, April 17, 2013 8:39 PM

[Drakelist] R4C Hum and audio transistor

I have a very nice R4C it had a hum with bad audio distortion so I decided to investigate, whilst taking it apart I noticed that if I touched the noise blanker the hum would alter, I removed the NB board and the hum was still there, I found eventually that the audio transistor had desoldered

Re: [Drakelist] R4C Hum and audio transistor

I must admit this receiver will probably benefit from the Sherwood audio board, however comparing both my R4C's one is perfect with no hum and very good audio whilst this one is shushy and has bad hum, maybe the main caps need replacing but when I couple another cap accross them no change so I

[Drakelist] R4C problems

It has now decided not to work anymore, I was listening to it and gradually the white noise came up, the signal died and now the preselector is in the wrong place for each band ie the 40m band livens up around the 80m mark however there is no signal present, even the cal does not work anymore.

[Drakelist] R4B noises

I have a nice R4B and after replacing all the caps except the main can, I still have a slightly raspy crackly noise when both RF and AF gain controls are fully open, is this normal? I just do not wish to chase something down that is not going to improve no matter how many bits I throw at it. I

[Drakelist] Crackle on R4-B

I have just got a new to me R4-B, it is a clean set unmodified in anyway, however it has an annoying crackle all the time, constant volume in the audio, I am sure it is the main cap but just to be sure, ideas? it is just low volume just like a commutator noise but in the background, it does