Heath AR 2 and Heath AR 3

[Hank Kryger]

Hi John

The AR-3 was sold from 1956 thru 1961.  The AR3 uses five tubes while 
the AR 1 and 2 used six tubes.  The 12BA6 BFO was removed and the AR 3 
circuit redesigned  so that the 12AV6 (2nd detector AVC) could also act 
as the BFO.  Info ref:  " Heathkit"  by Chuck Penson,  available from 
Electric Radio, Bailey CO  Phone: 720 924-0171.  Highly recommend this 
book if you are interested in the amateur radio history of Heathkits.

Have a nice day Hank WA9QJH

On 30, Jun 2005, at 23:06, John King wrote:

> Can someone run down the differences between the Heath
> AR 2 and Heath AR 3 receivers for me? When did the AR
> 3 come out?
>
> I have acquired a Heath AT1, VF1 VFO, AR 3 rcvr, and
> QF1 Q multiplier and am getting additional accessories
> from that period.
>
> Factual information will be appreciated. ER mag says
> 1952 for AR 2 and I think AT 1. Thanks and 73, John, K5PGW
>
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