[Hallicrafters] off topic HRO-60 coils

[Dan Cotsirilos]

But Howard it is only happening with the "D" coil. 1.8 to 4 mc! I have full
sensitivity with the 35mc coil. A bad RF tube would show the most at high
freq's would it not?  Dan
----- Original Message ----- 
From: "Howard R. Weeks" <weeksh at bellsouth.net>
To: "Dan Cotsirilos" <dcsfree at worldnet.att.net>
Sent: Saturday, September 04, 2004 8:23 PM
Subject: Re: [Hallicrafters] off topic HRO-60 coils


> Probably have something wrong with the RF amplifier.
> Your hand or sig gen is introducing enough signal to the mixer input
> to bring the output up.  I have seen that many times on various receivers.
>
> Howard Weeks
> Harlem, GA
>
>
>
>
> ----- Original Message -----
> From: Dan Cotsirilos <dcsfree at worldnet.att.net>
> To: Mark Shaum <k9tr at dtnspeed.net>
> Cc: <hallicrafters at mailman.qth.net>
> Sent: Saturday, September 04, 2004 8:25 PM
> Subject: Re: [Hallicrafters] off topic HRO-60 coils
>
>
> This is what I have found so far. I peaked the front coils in the GC mode
> and improved the sensitivity about 50% but it is still low. The BC mode is
> still dead! I checked the coils on 4 cans and they all conduct ok. I
taking
> a break for now. I will check to see if any trimmers are touching on Tues.
>
> There is a strange thing happening, I wonder if anyone has any idea why,
> when I put my hand near the 6BE6 behind the tuning condensers the gain
goes
> up to almost normal. If I put the output lead from my signal gen near that
> same tube the S-meter reading is much higher that through the ant
connector?
> Very strange! Especially about my hand?  thanks Dan
>
>
> ----- Original Message -----
> From: "Mark Shaum" <k9tr at dtnspeed.net>
> To: "DAN COTSIRILOS" <dcsfree at worldnet.att.net>
> Cc: <hallicrafters at mailman.qth.net>
> Sent: Saturday, September 04, 2004 3:58 PM
> Subject: Re: [Hallicrafters] off topic HRO-60 coils
>
>
> > Check to see if one of the trimmer capacitors is shorting.  I had one
> > that was, the rotor was a single-bearing type so was gently bent back
> > into position.  Also that pesky half-turn loop of wire in the coil
> > center used to adjust the inductance by bending it to add or buck the
> > inductance might break after too many pushes or pulls.  I had one HRO-50
> > coil where one of the the metal-blade switches that selects bandspread
> > or regular coverage was missing.
> >
> > 73! Mark K9TR
> >
> > Original Message
> >
> > From: "DAN COTSIRILOS" <dcsfree at worldnet.att.net>
> >
> >
> > I can't seem to raise more than one person on the National reflector.
> > Does anyone have any experience with HRO-50 60 coils? I have a "D" coil
> > that is dead. what can go wrong with these?  Dan
> >
> >
>
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