[Hammarlund] HQ-120X Restoration Versions/Schematics

[Carl]

I have both versions Joe, but didnt bother worrying about it as both were 
straightforward overhauls.

Since they were built from 39 to probably 41 perhaps there are dates in the 
documentation mentioned.  Or look at the RBG which was certainly later.

I also have early and late 129's as well as three 140's, one of which 
appears to be a factory made rack version.

Obviously I have a soft spot for those early models.

Carl
KM1H




----- Original Message ----- 
From: "Joe Connor" <joeconnor53 at yahoo.com>
Cc: <hammarlund at mailman.qth.net>
Sent: Sunday, February 20, 2011 8:24 AM
Subject: [Hammarlund] HQ-120X Restoration Versions/Schematics


>
> Does anyone know about the different versions of the HQ-120X?
>
> I've already found a couple of difference between my set and the manual on 
> BAMA.
>
> On mine, one of the cathodes of the 6F8 (pin 4), goes directly to ground 
> and one of the plates (pin 3) attaches to a 25K/1 W resistor. In the 
> manual on BAMA and in the Rider's schematic, however, that cathode 
> attaches to a 230-ohm resistor and that pin attaches to a 10K/1 W 
> resistor. On BAMA, there is an additional schematic for my version but no 
> parts list or voltage chart).
>
> Does anyone know where I could get a parts list and voltage chart for my 
> version? Which version is the later/better version? For example, if the 
> other version is better, it would be simple to rewire the 6F8.
>
> As always, thanks for your help.
>
>                                        Joe Connor
>
>
>
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