On Sun, 9 Dec 2007 07:15:04 -0800, W7CXA wrote:
I am looking for information on a 3 tube 75 meter am transmitter that was
around about 1958. Two of the tubes were 6146, one for modulator and one
for final. I cant remember what the oscillator was.

I see nothing close to your description in the 1957 ARRL Handbook -
in either the "Mobile Equipment" section, nor the "HF Transmitter"
section.

Or, are you referring to a piece of commercial gear?

There was no osc. buffer, and no mic. preamp?

(I did run across an ad for Burstein-Applebee.
Now, _that_ *really* brings back memories! )
73
Jonesy
--
Marvin L Jones | jonz | W3DHJ | linux
38.24N 104.55W | @ config.com | Jonesy | OS/2
*** Killfiling google posts: http://jonz.net/ng.htm

On Dec 9, 5:26 pm, Allodoxaphobia wrote:
On Sun, 9 Dec 2007 07:15:04 -0800, W7CXA wrote:
I am looking for information on a 3 tube 75 meter am transmitter that was
around about 1958. Two of the tubes were 6146, one for modulator and one
for final. I cant remember what the oscillator was.

I see nothing close to your description in the 1957 ARRL Handbook -
in either the "Mobile Equipment" section, nor the "HF Transmitter"
section.

Or, are you referring to a piece of commercial gear?

There was no osc. buffer, and no mic. preamp?

(I did run across an ad for Burstein-Applebee.
Now, _that_ *really* brings back memories! )
73
Jonesy
--
Marvin L Jones | jonz | W3DHJ | linux
38.24N 104.55W | @ config.com | Jonesy | OS/2
*** Killfiling google posts: http://jonz.net/ng.htm

Yup, good memories...
However, ARRL was not the sole source of info... I vaguely remember a
quick-n-dirty mobile AM with 3 tubes... But, why worry about what was
published then.. We can cobble up something similar today on our
own... Use a VXO for the vfo oscillator to make it stable under
modulation peaks... Use screen grid modulation... Won't need a 6146
for the modulator, a 12AX7 should do (I'd have to research that, so
don't take it for gospel)
OTOH, the nice nursey says I need to take my pills now...

denny / k8do