exactly the kind of info that I was looking for. Someone else that had
the same thoughts on the mattter as I did!!! Thanks
Joe K4TR
- Original Message -
From: "D. Chester" <[EMAIL PROTECTED]>
To:
Sent: Saturday, July 14, 2007 3:11 PM
Subject: Re: [AMRadio] R 388
If the pto is showing too much bandspread, you need to adjust the end
points. The natural ageing process of the Collins type PTO tends to do just
that. It is a routine adjustment in the R-390 series and the 75A-4.
Typically the end point adjustment is about 3 kHz off, from one end of the
band
teur Service"
Sent: Wednesday, July 11, 2007 9:45 PM
Subject: Re: [AMRadio] R 388
On Wed, 11 Jul 2007, kk4tr wrote:
THe problem is the band spread seems to be too wide on all bands and it
has been this way all the time.
By "change the slide rule dial" tdo you mean that you are
On Wed, 11 Jul 2007, kk4tr wrote:
THe problem is the band spread seems to be too wide on all bands and it has
been this way all the time.
By "change the slide rule dial" tdo you mean that you are adjusting the
'ZERO" screw, or are you actually changing the location of the pointer
along
like so we don't
use up the reflector space.
Joe KK4TR
- Original Message -
From: "John Lawson" <[EMAIL PROTECTED]>
To: "Discussion of AM Radio in the Amateur Service"
Sent: Wednesday, July 11, 2007 8:39 PM
Subject: Re: [AMRadio] R 388
On Wed, 11 J
On Wed, 11 Jul 2007, kk4tr wrote:
I was wondering if there were any experts on the Collins R 388 out here on
the reflector. I have run into a special problem that I need a bit of advice
with. I have had 3 of these reievers and have never run into this problem I
have. Any help or advice wou
Thanks John, I'll give that a look see.
Rick
There is a small flanged 'pulley' that engages the brass sector, to
which the Kilocycles fiducial.
On Tue, 22 Aug 2006, Rick Brashear wrote:
One last thing... what have I put back wrong or what did I leave out to make
the "zero" control move the dial left or right a tad when I use it? I've
There is a small flanged 'pulley' that engages the brass sector, to
which the Kilocycles fidu
Thanks John. Is there another manual for either other than the TM
11-854? I have an excellent repo of it I got from Robert Downs.
Rick
I have a copy of most of the manuals for the R-388/51J-series - and
the Sam's Photofact has a nice, concise set of simple alignment...
On Wed, 9 Aug 2006, Rick Brashear wrote:
There is a Sam's folder available for the 51J-3, could it be used also with
the R-388?
I have a copy of most of the manuals for the R-388/51J-series - and the
Sam's Photofact has a nice, concise set of simple alignment instructions,
along with th
Hi Charlie... thanks for the info. I've received several replies saying
basically the same thing you have. It seems there is an end adjustment
that can be made to the PTO to correct this fairly common problem. I
plan to dive into this one soon and get my feet wet. This is my first
388, so I
Ric: NO the PTO runout is not normal. I own 2 R-388 and they are roughl the
same as yours. I have also owned R-388's when they were brand new. In new
condition, even at the band edges, the correction was only a Kc or 2. This
means we have work to do to correct the runout. I am too lazy so I just
Thanks Peter. I really appreciate the info. I am not able to calibrate
all of the frequencies, so I guess I'll need to investigate it further.
Thanks for the name and link.
Rick
Peter Wittenberg wrote:
Rick, it sounds like the PTO is no longer tracking as it should. These are
very old radi
End point calibration problem. Very easy to fix. Either refer to the manual,
or Hollow State News articles.
http://www.hollowstatenews.com/
73,
Ed, VA3ES
From: Rick Brashear
Before I dive into this R-388 head first I better find out if there is a
problem or it's just an idiosyncrasy of t
Rick, it sounds like the PTO is no longer tracking as it should. These are
very old radios and that is often a problem. There is an adjustment but you
will have to remove the PTO to do the adjustment. Often the adjustment
cannot adjust the total offset since these radios are so old. If you can
cal
Note to John, KB6SCO:
If you do end up removing and repairing your R-388 PTO, you might wish
to perform a couple of simple, related repairs that will dramatically
improve its tracking (if that's a problem) and reliablity. One good
reference for PTO servicing is on KA4KOE/Philip Neidlinger's w
On Sun, 25 Dec 2005, Mike Sawyer wrote:
I'm curious if they are the same as the ones used in the T-195. I think that
the 75Ax use that one. I might be worth a look to
(un)Fair Radio. They used to sell the T-195 PTO's for a song. Beats the hell
out of the alternative.
Right now they list
John Coleman ARS WA5BXO wrote:
I have had one in and out of a 32V3 XMTR several times repairing flood
damage. It's not that hard. The oscillator circuit is not that
complicated. I don't know the same about the 75A4 PTO removal, but if
that is not to bad, then just fined the open resistor or t
I have had one in and out of a 32V3 XMTR several times repairing flood
damage. It's not that hard. The oscillator circuit is not that
complicated. I don't know the same about the 75A4 PTO removal, but if
that is not to bad, then just fined the open resistor or the shorted
capacitor and replace i
I had the same problem several years ago. I found an open resistor in the
PTO. Check the voltages on the two PTO tubes. You'll find the problem.
73,
Darrell, WA5VGO
At 04:47 PM 12/25/2005 -0500, you wrote:
Further to my Xmas Eve Scrooge Radio Post - I have discovered that no
signals of
I'm curious if they are the same as the ones used in the T-195. I think that
the 75Ax use that one. I might be worth a look to
(un)Fair Radio. They used to sell the T-195 PTO's for a song. Beats the hell
out of the alternative.
Mike(y)
W3SLK
- Original Message -
From: "John Lawson" <[EM
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