21-08-2018, 11:01 AM
A couple of things I have confirmed are; I do appear to have an AM oscillator, or at least I get interference on MW when I sweep across the dial on the RGD.
I checked the IFT's against the ITT and there are some differences of up to an ohm on some of the AM ones, but they do all more or less match. Maybe they used thinner wire on the RGD, they certainly used inferior resistors.
I have also changed C352 the OP dc blocking cap as although this came up very well on my Peak ESR tester it looked like it showed signs of leakage.
I swapped IFT L313 with the one from the ITT and it made no difference.
So next I will try your suggestions Terry.
Thanks
Mike
I checked the IFT's against the ITT and there are some differences of up to an ohm on some of the AM ones, but they do all more or less match. Maybe they used thinner wire on the RGD, they certainly used inferior resistors.
I have also changed C352 the OP dc blocking cap as although this came up very well on my Peak ESR tester it looked like it showed signs of leakage.
I swapped IFT L313 with the one from the ITT and it made no difference.
So next I will try your suggestions Terry.
Thanks
Mike
