[Hallicrafters] HA-6 and HA-2 transverters

[Carl]

National Radio had a VHF line almost ready to go into production when the 
parent company crashed. 6 and 2M transverters and NCL-2000 based 6n2 amp. 
Some prototypes exist.

I have the P&H 6-150 manual and will scan it and send to Edebris/BAMA as 
soon as the new laser do it all printer arrives.

Carl
KM1H


----- Original Message ----- 
From: <N4ch at aol.com>
To: <radioconnection at gmail.com>
Cc: <Hallicrafters at mailman.qth.net>
Sent: Tuesday, August 10, 2010 12:50 AM
Subject: Re: [Hallicrafters] HA-6 and HA-2 transverters


> Hello Pete (and others),
>
> The P&H VHFtransmitting converters are very rare;  besides the one I found
> a few years back, I've seen just one other.    I doubt many were made.
> I've been looking for a manual for  years.   All of this also holds true 
> for
> their "Spitfire" amplifier  for HF.........this was their sweep tube 
> version
> of the Heathkit "Kilowatt  Compact" mobile amplifier.
>
> Interesting U mention the Johnson 6N2 exciter as a dual-band  transverter
> conversion project.........that sounds  interesting.   That exact idea
> apparently occurred to some engineers  at the company back in the 60s. 
> It turns
> out that EF Johnson ALMOST  brought a dual-band 6N2 TRANSVERTER to market.
> They actually  prototyped such a unit, and, based on inputs from a few
> collectors and ex  Johnson employees I've exchanged info with, about a 
> dozen
> such  transmitting adapters were built.   The cabinet was the same  one 
> that
> was used for the SSB transmitting adapter (and it had the same  cosmetics
> that were used in the Valiant II).   I was lucky enough to  find one of 
> these
> things about 10-12 years ago, and it actually  works.   It consists of an
> input attenuator (suitable for being driven  with the Invader or the 
> ill-fated
> Avenger), crystal-controlled LO, mixer,  and an amplifier chain that used 
> a
> single 6146 in the output..........output is  30-40 watts.   A power 
> supply
> that runs everything is built  in.   Johnson also made a 6N2 receiving
> converter; these DID wind  up getting into full production, and they do 
> show up
> once in a  while.   The MANUAL for the 6N2 transmitting adapter (yes, they
> DID  get as far as printing some) includes references to installing this
> receiving  converter inside, and linking it up with the function switch, 
> and the
> adapter  even has holes punched for this purpose........the net result 
> would
> be a  bi-lateral system that included everything in one box.........a
> dual-band  receive/transmit adapter, complete with power supply.   I've 
> never
> seen the "kit" of mechanical hardware that would be needed to install the
> receiving section (and the electrical mods to tie the LO from either the
> receiver or transmitter circuitry to the "other side"), and I doubt I ever 
> will.
>  The design of this detail may have never been completed;  I don't know.
> I guess the plug got pulled on the company's  involvement in the amateur
> business about the time this project's design was  being finished.
>
> Good luck in your quest for the HA-6 and/or HA-2........they  do show up
> once in a while, but it's VERY rare to find one that isn't rusted  out, or
> still has most of the paint on the front panel intact.
>
> 73, Herman, N4CH.
>
>
>
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