[HBR] pots required HBR13.

[Bill Fizette]

Having just fought the battle of trying to find the WW pots that ole' TC 
specified for the HBR 13 I am building, I am now getting curious as to why 
he did specify that these particular 5 watt components were needed.  The 
current through the IF pot, for example is somewhere around 22 ma, I am 
told.
Would not the readily available AB sealed pots work here?   If not, why? 
What am I missing here?

Bill  w2dgb


----- Original Message ----- 
From: "Walt Hutchens" <waltah at earthlink.net>
To: "HBR Receiver List" <hbr at mailman.qth.net>
Sent: Sunday, February 01, 2009 6:06 AM
Subject: Re: [HBR] pots required HBR13.


>> Can someone please direct me to a supplier of the pots as used in the 
>> HBR13.
>> The values are 2K, 10K, and a 5K. All are 5W.
>
> Mouser is one supplier, Antique Electronic Supply is another.  Five
> minutes with Google will find others.
>
> One issue that's new in recent years, particularly with places as big
> as Mouser, is the number of choices. In particular watch out for
> metric parts with 6 mm shafts and 8 mm bushings. Read the specs
> closely before ordering.
>
> That wattage requirement will narrow your choices some: Those will
> have to be wirewound.
>
> Come to think of it, wirewound pots don't usually go permanently bad
> unless they're overloaded.  Have you tried just working them back and
> forth a couple dozen times?
>
> Walt
> KJ4KV
>
>
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