[Heathkit] Heathkit SB-610, a new twist

[Jim Shorney]

On Fri, 08 Jun 2012 11:25:49 -0400, Dick KF4NS wrote:

>Well, both are finally in real fine shape, better than new, UNTIL THIS NEW TWIST JUST DISCOVERED.
>
>It seems that the HW100 tap for the 610 must be terminated by 50ohms and a tuned circuit at the IF freq 
>of 3395khz. HMMMM, this is definitely a NEW TWIST. If my luck was not bad I would not have any at all.


Not surprising. Nothing happens in a vacuum; when you add another circuit
element (the 610 and cable) to the IF, you change the parameters of the
circuit. You need to either leave the scope connected at all times, or buils a
small solid-state buffer amp into the radio to isolate the IF from the added
circuit element.

73

-Jim

--
“There’s something out of place – let’s go and poke it with a stick.” – The Doctor (Amy’s Choice episode)