[Heathkit] coils for SB610 and SB620 and HO-13

[Chris Kepus]

Hi Gary,
I do not have your coil but here is some info below that may help you find
one that will do the job.  Tom has some great info and it looks like a
strong possibility that the SB-620's 1600 Khz coil might also work.  
GL es 73,
Chris
W7JPG


-----Original Message-----
From: heathkit-bounces at mailman.qth.net
[mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Tom NØJMY - AAR7FV
Sent: Wednesday, May 24, 2006 6:42 PM
To: Michael Tortorella
Cc: heathkit at mailman.qth.net
Subject: Re: [Heathkit] coils for SB610 and SB620

Sorry, you'll probably want to look at www.hayseedhamfest.com/13fig1.jpg 
as well.

Tom

Tom NØJMY - AAR7FV wrote:
> Mike, in case you want to try your hand at rolling your own, go to my 
> website for the spec's and blueprints of all HO-13 and SB-620 "i.f." 
> coils.  The ones you need are:  www.hayseedhamfest.com/13spec.jpg , 
> www.hayseedhamfest.com/13note.jpg and www.hayseedhamfest.com/13fig3.jpg .
>
> While your at it, check out the home page and tell me what you think.
>
> BTW, the only difference between the 620's 40-775 and the HO-13's 
> 40-588 is that the 40-588 has three terminals, where the 40-775 has a 
> fourth "dummy" terminal that wasn't connected to the coil.  Offhand, I 
> don't know if the "dummy" lug was used for something such as a 
> tie-point terminal for something on the SB-620, or if it was just 
> there because that's the way the vendor made them.  I should open up a 
> 620 and look, I guess.
> Better yet, since you've apparently got yours open already, how about 
> you look and tell me?
>
> 73 es best dx,
> Tom
>
> Michael Tortorella wrote:
>> Hello to the list,
>> I am setting up a SB620 for 455 kHz and need the 40-775 coil.  Can 
>> trade a
>> 40-807 or 40-748 (this last is from the SB610).  Or maybe other 
>> advice on
>> winding new coil, etc.
>> BTW, somewhere in my researches I read that the 40-746 SB-610 col for 
>> 455
>> kHz is the same as a Miller 12-C2.  Hope this helps someone.
>> Thanks and 73
>> Mike W2IY
>
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