64' Ford Falcon Radio Buzzing

[R_J]

Re: 64' Ford Falcon Radio Buzzing

The ones used in this radio are like this, they do rely on air as the gap but have an insulator so if you tighten the screw too much it won't short
There are a few other types listed on this site http://variable-capacitors.blogspot.ca/

[keeney123]

Re: 64' Ford Falcon Radio Buzzing

I know the ones you are talking about an there is are just air caps. The plates would rust together. Even on the mica ones they can get to a point were they can not be turned. The right type of cleaner will not harm the mica. The problem comes when people use like WD 40 and car degreaser that may attack metal or what ever you may have. So it is important to get the correct contact cleaner. Usually when the cleaner is listed as a contact cleaner it will be safe, but you always have some bafone that sells crap. I have attached a picture of a large air cap. It is the same principle in a smaller package however some cars did utilize the larger ones. These would only get cob webs in them and dust until they got the smart idea of enclosing them.

here is a smaller one

[keeney123]

Re: 64' Ford Falcon Radio Buzzing

R_J This is a interesting read http://www.iequalscdvdt.com/air-variable.html

I was looking for the old disk cap exposed to air and with the tiny mica peace that could break easy. I ran across it earlier but could not find it again.

[budm]

Re: 64' Ford Falcon Radio Buzzing

https://www.badcaps.net/forum/attach...1&d=1480447403
as you can see, in those car radio, the tuning in of the station is done by moving the slugs of the tunning coils, you can see 4 of them in that tuner assembly. Fixed lot of old car radio when I was young, lot of them due to fail vibrator in the car radio with tubes!
I also had to replace lots of the rubber clutch disk.

[goontron]

Re: 64' Ford Falcon Radio Buzzing

You no nothing of my experience and I've been in this industry for probably longer than you've been alive. I am far from NEW SCHOOL as you put it. In the repair business 100 radios is nothing.

Yes, im sure following a repair script and having racks full of equipment makes you know everything in the world /s

[R_J]

Re: 64' Ford Falcon Radio Buzzing

I was going to say something but whats the point, move on

[keeney123]

Re: 64' Ford Falcon Radio Buzzing

You no nothing of my experience and I've been in this industry for probably longer than you've been alive. I am far from NEW SCHOOL as you put it. In the repair business 100 radios is nothing.


and thanks Caphair glad I could help

So I am 63 years old. How long have you been repairing. Old school does things by their senses new school does things instrumentation. My experience is new school, but I have work with old timers that are old school. So have I miss read you?

[keeney123]

Re: 64' Ford Falcon Radio Buzzing

I was going to say something but whats the point, move on

Do not give up. Problems get resolved by communicating.
You are not going to hurt my feelings and if you hurt other people's feelings because you say what you believe well that is too bad for them.

[stj]

Re: 64' Ford Falcon Radio Buzzing

did the fucking caps get changed yet, or is this just gointg to turn into an insult thread with a de-calibrated radio as a bonus??

[redwire]

Re: 64' Ford Falcon Radio Buzzing

caphair, if you're still out there, I tried to narrow down the make+year of the radio but no luck. Apparently Bendix, Motorola, Tenna, Automatic Radio, Philco were contenders.
A capacitor has 1962 date code in your pic. Nothing on the PNP output transistor p/n 8P404V as far as radio make.
Bendix was using PC boards, Motorola point-point wiring but not matching your pics. It looks real close to the 1958-1963 Motorola Volkwagen radio schematic, or the 1964 one.

For its age, the electrolytics (2caps+3 section can) are surely toast and probably need to replace a germanium transistor or two as others have mentioned. Unfortunately, they are a pain to find. To use silicon transistors needs some circuit mods to work.

I find it interesting these old car AM radios, RF section typically uses Japanese 2SA72 or 2SA73 transistors. They must have been better technology then.

[kc8adu]

Re: 64' Ford Falcon Radio Buzzing

agreed.
everything is a waste of time till they are all replaced.
those epoxy ended callins are all open now.
and i align these by ear too.its a crude radio not rocket science!

did the fucking caps get changed yet, or is this just gointg to turn into an insult thread with a de-calibrated radio as a bonus??

[keeney123]

Re: 64' Ford Falcon Radio Buzzing

Perhaps these people can narrow down the radio type. This is their email
ques@tpocr.com