Hi Todd and all,
Bob W9RAN asked me to download the HRO-50-1 manual from BAMA and try to
print it for him along with the schematic.
Well I did but the BAMA manual was scanned as JPG's and they are pretty
unforgiving.
I would like to see if someone has an HRO -50-1 manual that I could borrow
to scan and provide to Bob and to BAMA that is in a more friendly format.
I will be happy to provide postage both ways and also a deposit on the
manual if needed. I can also provide references to the work I have done on
other equipment archives.
Thanks!
Larry WA9VRH
----- Original Message -----
From: "Todd, KA1KAQ" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
<[email protected]>
Sent: Tuesday, November 27, 2007 4:17 PM
Subject: Re: [AMRadio] HRO-50
On Nov 27, 2007 4:53 PM, <[EMAIL PROTECTED]> wrote:
----- Original Message -----
Subject: Re: [AMRadio] HRO-50
Date: Tue, November 27, 2007 15:48
From: "jeremy-ca" <[EMAIL PROTECTED]>
> We got plenty of all era HRO's in for service and a jig was not used.
> Once
> you got the knack it was easy. The holes in the chassis are there for a
> reason.
>
Hi Carl!
Are you referring to the holes in the TOP of the chassis for the high-end
adjustments, or holes in tha back of the coil rack, under chassis, for
the
low-end adjustments? Neither of my HROs (a 2.5V heater 1935 model, & and
HR0-7R) have the latter, so the coil racks need to be removed for the
bottom-end-of-range adjustments. I do understand certain models had them,
but mine don't :>(
I'd like to learn more about this process at some point. I know you
have some experience with the older HROs Larry, and Carl worked for
National for a number of years, so he probably spits pinwheel dials. I
figure between the two of you, I should be able to figure it out.
The rig in question is a '47 HRO C utilizing the HRO 5RA1 receiver.
I'm trying to put together a set of the 'bright faced' coils, or maybe
just find the aluminum plates for the coils that came with the set
(currently a mishmash of types).
The thing was pretty numb initially. Tweaking a few of the coils
ever-so-slightly helped, but there's a specific order to follow and I
know I didn't do this (having no clue what the order is).
All things being equal (good tubes, proper IF alignment), what is the
best way to align the coils?
~ Todd, KA1KAQ
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