Re: S-85: how are the RF amplifier tube (v1) and the MIX/OSC tube (v2) coupled in band1?

don Root All Messages By This Member #31909 Edited 开云体育 Maynard FYI ??S-40 [no suffix]?? This seems to have no C62 and looks like “your” 40A at first glance? ..SO? maybe you have an early run manual of the “40A” ? ? FYI ??S-40A I was using= ??? ? Another thing, the bias/AVC line to V1 changed when going to the 40B, so it needed that C33? because L3 was not a transformer. ? ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of Maynard Wright via groups.io Sent: Thursday, February 27, 2025 3:51 PM To: [email protected] Subject: Re: [HallicraftersRadios] S-85: how are the RF amplifier tube (v1) and the MIX/OSC tube (v2) coupled in band1? ? And my S-40A schematic is from Sam's Photofacts (via the Web) and it doesn't have C62 as in your schematic nor does it use independent designation of each component, but labels them with numbers referred to the table of components. So more than one component can have the same number. So I suspect that your schematic excerpt is from the S-40A Hallicrafters manual, which looks (in your excerpt) more like the S-40B and S-85 schematics I have from Hallicrafters manuals. But I don't have that manual. Since those two schematics don't agree, I wonder whether there was a revision during production of the S-40A. 73, Maynard W6PAP ? -- don??? va3drl

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