Philco 90 - Tuning Gang?

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Philco 90 - Tuning Gang?

etech
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Posts: 237
Threads: 24
Joined: Dec 2007
City: Gladwin, MI

#5

10-01-2008, 03:13 PM

Quote:A short braided bond to a tuning gang frame insures a low impedance RF ground.

In general, I am aware of this reason to use a braid type of grounding strap. I have used them many times on homebrew transmitter and/or antenna projects. I have just not seen this used on these Philco radios before.

I took another look at both of my model 90 chassis'. The one that had the ground braid was serial #709734 and the braid was soldered directly to the heads of the tuning gang mounting bolts. The other chassis is serial #535341 and there is no evidence that the ground braid was ever there. That is to say that I see no remaining solder on the heads of the mounting bolts and there is no evidence that there was ever a braid soldered to the top of the bypass condenser can as there is on the other chassis. Now I suppose that it is possible that they soldered the braid to lugs that were attached to mounting bolts and a ground point on the chassis. Or it is possible that some chassis were built with the grounding braid and some were not?

Can anyone else offer an information?

Ed

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Messages In This Thread

Philco 90 - Tuning Gang? - by etech - 10-01-2008, 07:59 AM

Re: Philco 90 - Tuning Gang? - by Terry Burns - 10-01-2008, 09:45 AM

Re: Philco 90 - Tuning Gang? - by etech - 10-01-2008, 12:14 PM

Re: Philco 90 - Tuning Gang? - by Chuck Schwark - 10-01-2008, 01:35 PM

Re: Philco 90 - Tuning Gang? - by etech - 10-01-2008, 03:13 PM

Re: Philco 90 - Tuning Gang? - by etech - 10-01-2008, 03:43 PM

Re: Philco 90 - Tuning Gang? - by BDM - 10-01-2008, 06:52 PM

Re: Philco 90 - Tuning Gang? - by BDM - 10-04-2008, 10:33 PM

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