HR-10 worthwhile mods

[Brian Carling]

Allen and Bill - I would LOVE to see these mods.
I have a REALLY nice HR10B here and am already enjoying 
it a lot with the DX60 and HG10B VFO.

73 - Brian

On 8 Feb 2006 at 22:31, Bill Coleman wrote:

> On Feb 7, 2006, at 8:39 PM, Allen Jones wrote:
> 
> > My latest project is an HR-10 which has been sitting
> > in a closet for several years.  It seems to work well
> > but I need to restring the dial.
> >
> > Any suggestions for worthwhile mods that don't require
> > hole drilling?  I believe adding voltage regulation to
> > the HFO is advised.
> 
> There were a bunch of mods listed in a 73 magazine article. I think  
> it was the February 1972 issue, maybe it was November 1972. Can't  
> remember.
> 
> If I can remember the mods, it consisted of replacing the 6X4 with  
> silicon rectifiers, an improved audio-derived AGC system using  
> silicon diodes, 0A2 regulation of the BFO and HFO. It did require one  
> hole to be drilled in the chassis to accomodate the 0A2.
> 
> I made these mods back in 1975, when I had an HR-10B. The AGC was a  
> vast improvement, and stability was much improved with the 0A2.
> 
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
> Quote: "Not within a thousand years will man ever fly!"
>              -- Wilbur Wright, 1901
> 
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