[Heathkit] Re: heathkit panadapter sb 620 problems

[Frederick W. Holmes, W1SKU]

Hi Ed,

On an SB-301, you need to couple to pin 5 of V3 with a 7.5 pf dipped mica
cap. Then run RG-62 to a spare RCA on the rear apron. As for the 310, I
don't have a schematic of one to help you out, put it would probably be the
same as I believe that both the 301 and the 310 use the same mixer stage.

Hope this helps.

Happy New Year !!
73 de Fred, W1SKU

----- Original Message ----- 
From: "Kees & Sandy" <windy10605 at juno.com>
To: <heathkit at mailman.qth.net>
Cc: <supermechanic18360 at yahoo.com>
Sent: Wednesday, January 03, 2007 6:21 PM
Subject: [Heathkit] Re: heathkit panadapter sb 620 problems


Can one of you guys help Ed out ? My plate is just too full.
73 Kees K5BCQ


-- Ed Heimbach <supermechanic18360 at yahoo.com> wrote:
 Hello, I'm getting back into radio after a 25 year
lapse , previously wb3eii.
 I am having problems getting a 3395khz signal at my
mixer tube for the if hook-up leading into the sb 620.
 Three different rigs I checked out gave me the LMO
signal at the plate of the mixer tube, not the raw IF
signal that I am looking for.
 So,, the unit won't display a pip for me.
 When the sb 620 has a 3395 signal injected (via
signal generator), a pip is displayed, so I know I
have the 620 working correctly.
 any Ideas why I can't get a signal from the rig to do
this?
 So far I have tried two different sb 301's and a sb
310, with no luck.
 What kind of a singal needs to be running into the
mixer tube, so I can get the IF freq, not the LMO freq
on the plate?
 Thanks for any insights, Ed.

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