Re: Hello to the group, new member with a TW-2000
开云体育Adrian??? Yaaa , ?Silvered Mica caps underneath; ?but out of tolerance that much? you say? ???the cans will not tune down to 455kHz ??… ?so ?It would seem the caps decreased in mmFds. ????? but? you also say? ?I? can get the IF's to peak at 530kHz, … ?so It would seem the caps increased in mmFds. But that is strange, how? ?? …so I am missing something I guess. Are all slugs moving ok? Do they all seem to peak near the same frequency?
Thanks for the good picture of the IF can guts ?? ? From: [email protected] [mailto:[email protected]] On Behalf Of Bill Green via groups.io
Sent: Monday, November 18, 2024 1:52 PM To: [email protected] Subject: Re: [HallicraftersRadios] Hello to the group, new member with a TW-2000 ? the 2 plastic squares are the bread and in between the caps are the meat. ? On Monday, November 18, 2024 at 01:35:43 PM EST, Adrian Hodgson via groups.io <adrianh991@...> wrote: ? ? May as well post this here following on from my last.? The radio is basically working but the IF section is not as expected. The coils do not have any built in caps that I can see, and the cans will not tune down to 455kHz as it says it should be in the book. There is what appears to be a stiffener in the base of the IF assembly it has a rivet going all the way through, but appears not to have any electrical connection with the coils.? Thinking this is just to guide a trim tool ? The service manual does not show any external capacitance for the cans so I am assuming that it relies on a bit of self capacitance and that of the valves input/outputs to resonate.? I can get the IF's to peak at 530kHz, but one tuning slug is just on the edge of peaking. ? The other option is to add a few external capacitors. ? Just wondering on peoples thoughts on what I am finding? ? ? ? ? Adrian _._,_._,_ -- don??? va3drl |
don Root