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Model 70 air cap ground strap.
#17

I meant to say series to the rf, I edited that. Yes, I am trying to reach the 260, and did wind the coil to the original holes comparing against my photos of the original coils. Thought that should get me there, then back off turns if needed, but just cannot seem to get to the the inductance bounced against 410 PF. I wonder of purity of the original wire copper against what we buy today. I measured inductance as is, and took off turns to measure again, that's much to derive and absorb, so I am dealing with the original, coatings, purity, and the the cotton coated outer wrap and the distance between the windings. At the moment, added turns to the RF coupling to the osc. and mounted them a bit higher on the coil, just experimenting. It is difficult to match the original, but will keep my efforts to see when it comes into play. Listening to it right now is great 1140 Richmond down here in NC, wavers, but no AVC, but sounds like they are here with me, ha! I will try your methods too. Joe Pags 1210 a bit more difficult, but coming in.


Messages In This Thread
Model 70 air cap ground strap. - by radio1 - 06-10-2020, 07:43 PM
RE: Model 70 air cap ground strap. - by rfeenstra - 06-11-2020, 07:38 AM
RE: Model 70 air cap ground strap. - by radio1 - 06-11-2020, 08:39 AM
RE: Model 70 air cap ground strap. - by radio1 - 06-12-2020, 04:17 PM
RE: Model 70 air cap ground strap. - by radio1 - 06-12-2020, 06:01 PM
RE: Model 70 air cap ground strap. - by rfeenstra - 06-12-2020, 10:20 PM
RE: Model 70 air cap ground strap. - by radio1 - 06-13-2020, 06:39 PM
RE: Model 70 air cap ground strap. - by radio1 - 07-02-2020, 07:21 PM
RE: Model 70 air cap ground strap. - by radio1 - 07-03-2020, 05:25 PM
RE: Model 70 air cap ground strap. - by radio1 - 07-03-2020, 05:42 PM
RE: Model 70 air cap ground strap. - by radio1 - 07-03-2020, 08:19 PM
RE: Model 70 air cap ground strap. - by radio1 - 07-04-2020, 06:11 AM
RE: Model 70 air cap ground strap. - by rfeenstra - 07-04-2020, 08:06 AM
RE: Model 70 air cap ground strap. - by radio1 - 08-13-2020, 05:13 PM



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