Re: Sx100 question on 50.5 kc alignment
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Thanks Dan, I missed that one.
From: [email protected] <[email protected]> on behalf of Dan <pitfit@...>
Sent: Monday, April 1, 2024 8:44 PM To: [email protected] <[email protected]> Subject: Re: [HallicraftersRadios] Sx100 question on 50.5 kc alignment ?
?Test point B is DC. Keeping the displayed voltage around 1 volt or so isn¡¯t super critical during the 50.5 alignment ?but, in general, you usually want to keep the injected and observed voltages pretty minimal to get the best alignment, unless
the manual calls for a specific voltage or level. Pay attention to your AGC switch. I don¡¯t quickly remember if the manual says to have it on or off for the 50.5 alignment (probably off, I think) but on or off will make a huge difference on the prevailing
voltage at test point B so make sure yours is set right.
Can you reduce the level on your sig gen? If you can¡¯t get down to 1-2 volts or so you probably are injecting too much 50.5 kHz or your AGC switch is not set right. You should be able to keep test point B easily in a ~1-3 VDC range and peak T3-T6 from
there.
I keep an old HP-606A around just for the 50 kHz Drakes and Hallicrafters. I set and confirm a 50.5 output using a scope with a counter function. The 606 is dead stable and warms the shop in the winter.
Dan
WB4GRA
On Apr 1, 2024, at 8:37?PM, waltcates <cateswa@...> wrote:
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waltcates