¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io

Re: S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!


 

¿ªÔÆÌåÓý

Guys, agreed for L3? , but the connections to L6 ?don¡¯t have a source wire shown and don¡¯t have the same switch profile for grounding so the L6 area is a big part of the mystery.

The switch profiles and pointers [whatever each is called properly] seems clear enough on the drawing, so that is not inquestion?

The S-40A, changes? to get to the S-40B ?might offer some clues.? Is there an S-40 manual? What does it show.

Another thought; it is easy to add ,subtract, and change caps and resistors, but changing a big stock of custom band-switches might rattle the cage of the bean counters, and won¡¯t be easily accepted, or might be a lot of work [what do they stock?, and does halli build switches from various ?wafer sets?].

Even those custom coils might be hard to change.

Note that L3 and L6 don¡¯t have the same part number.

From: [email protected] [mailto:[email protected]] On Behalf Of Maynard Wright via groups.io
Sent: Thursday, February 13, 2025 5:04 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] S-85 refurbish: I've got a problem during the RF alignment of bands 1 and 2 - trimcaps don't peak!

?

Hi, Emanuele,

This would not be an unusual way to wind a transformer of the types like
L3 and L6, especially if there is a turns ratio much higher than unity.
That might be the case in these receivers, but we aren't told that by
the available literature.

73,

Maynard
W6PAP


--
don??? va3drl

Join [email protected] to automatically receive all group messages.