had the t4x r4a and ms4 ac4, and truly loved that setup!
and could use a 1N34 diode which controlled the pitch of an audio 
oscillator, with a hunk of wire to tune it all, higher the pitch, 
higher the output. I tried not to overload the 6JB6 finals! :)
but, as you'all know that rig would run 200 watts PEP, and probably 
as much input on CW.


At 01:05 PM 05/24/13, you wrote:
>Hi Jim,
>What a wonderful rig the TR-4 was; I had the matching remote VFO/speaker
>cabinet into which you could slide the AC4 power supply. Also had the rig
>mobile in my dad's truck/camper. I also had dots at the 5Khz marks.
>Albert S., WA7FXB
>----- Original Message -----
>From: "Jim Gammon" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Friday, May 24, 2013 2:36 PM
>Subject: Drake Tr-4
>
>
> > When I had my Drake Tr-4 I had a ham friend mark the bezel every
> > 5 KHZ with smaller dots.  Those Drake rigs had great linear
> > tuning across the bands.  Pretty good for back in the 70's.  I
> > also had an audible tuner that I still have, but it no longer
> > functions.  That was hooked into a cheap Radio Shack SWR meter
> > and I could tune for the highest tone out of the audio box.  Jim
> > WA6EKS
> >
> > ----- Original Message -----
> > From: Howard Kaufman <[log in to unmask]
> > To: [log in to unmask]
> > Date sent: Fri, 24 May 2013 06:44:18 -0500
> > Subject: acessible radios
> >
> > All in the ear of the beholder.
> > I started out with a johnson valiant.  I tuned the transmitter by
> > pressing
> > my ear to the metal case, and listening for the dip in hum.  I
> > tuned the
> > grid by listening to the click of the meter needle.  Later I
> > counted the
> > dial turns on the drake radios.  Since each turn was 25 khz, you
> > could get
> > with in 2 khz or so quite easilly.  I have wondered if a neon
> > light coupled
> > to a feed line could be read by an audible light probe.  How good
> > would
> > maximum brightness be?  Interesting experiment.  Then in the late
> > 80's I
> > bought a triton 4 and found the speech box that tentec made for
> > it.  I
> > thought I had died and gone to heaven.
> > I have an Omni D and still have that box.  That's a backup radio.
> > We've come a long way.
> > H T Kaufman MSW LCSW
> > Adaptive Technology Instructor
> >