HR-10 worthwhile mods

[jimbristol]

OK you guys... I just can't stand it any longer... Everybody here in the
Twin Cities calls me a weenie for loving my DX-60A/HR-10/HG-10... I love CW
and back in 1964 when I bought and built the darn thing I worked 17 states
in the first week after it was done and I thought I was God... I have made
all kinds of mods plus redesigned it for complete QSK operation... If I'm
sending at 20 words per min and someone wants to break me with a dit or a
dah then can do it... TR switch to protect the receiver and the whole nine
yards... I just spent the last 2 days rebuilding the function switch
(replacing smoldered contacts with contacts from another ceramic switch)
with super glue and high strength lock tite and by all that is holy and
right the darn thing is sitting it the shack right this very minute working
like a dream... This last time the high voltage contacts shorted and took
out a couple of diodes in the power supply and the switching contacts too...
I've done so much work on the darn things I dream about it all night...
Sorry to butt in but have been reading all your emails and I just couldn't
stand it any longer... I had to shoot off my mouth and let you guys know
that I'm pleased to know that there are a few really great HAM'S left in
this world... Jim B...

----- Original Message ----- 
From: "Brian Carling" <bcarling at CFL.RR.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, February 09, 2006 6:50 AM
Subject: Re: HR-10 worthwhile mods


> 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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