I saw an auction for a Sampson Modulator which looks to be a way to
apply full plate modulated audio to the output section of a Collins
transmitter or transceiver. it has the "11 pin octal" socket which is
used, aside from relays, only two places I know of, the Collins S-Line
ham equipment and Hammond organ speaker cabs.

First, is that what this is?

Second, since the KWM-2 has no AM position, how is the BFO disabled
for AM rx operation? The audio would be unpleasant even if intelligible
if AM were listened to in a SSB mode.


My guess is that this was actually intended for illicit 11 meter use
but would be usable on any band.

Actually, receiving am with a bfo is fine. You are just copying 1/2 of the
sideband. The Drake 1A came out when am was still popular and no am
detector or switch. Called exhalted carrier or something like that.

I think there were a number of rigs that use the 11 pin plug. The Johnson
products, including the Ranger and Pacemaker and Valiant, if I recall
correctly. But, do not shoot me, please, if I am wrong. My wife points out
my faults often.

73, Colin K7FM

"Bret Ludwig" wrote in message
oups.com...

I saw an auction for a Sampson Modulator which looks to be a way to
apply full plate modulated audio to the output section of a Collins
transmitter or transceiver. it has the "11 pin octal" socket which is
used, aside from relays, only two places I know of, the Collins S-Line
ham equipment and Hammond organ speaker cabs.

First, is that what this is?

Second, since the KWM-2 has no AM position, how is the BFO disabled
for AM rx operation? The audio would be unpleasant even if intelligible
if AM were listened to in a SSB mode.


My guess is that this was actually intended for illicit 11 meter use
but would be usable on any band.


11 pin Octal socket was used on a LOT of equipment in the 50/60s.

Your right tho....sounds like some sort of CB junk to me.

I used Collins S-lines and KWM2s for years. Never ever heard of a outboard
"AM Modulator". Why anyone would want to do that is beyond me.

Dan/W4NTI

Behold, Dan/W4NTI scribed on tube chassis:


"Bret Ludwig" wrote in message
oups.com...

I saw an auction for a Sampson Modulator which looks to be a way to
apply full plate modulated audio to the output section of a Collins
transmitter or transceiver. it has the "11 pin octal" socket which is
used, aside from relays, only two places I know of, the Collins S-Line
ham equipment and Hammond organ speaker cabs.

First, is that what this is?

Second, since the KWM-2 has no AM position, how is the BFO disabled for
AM rx operation? The audio would be unpleasant even if intelligible if
AM were listened to in a SSB mode.


My guess is that this was actually intended for illicit 11 meter use
but would be usable on any band.


11 pin Octal socket was used on a LOT of equipment in the 50/60s.

Your right tho....sounds like some sort of CB junk to me.

I used Collins S-lines and KWM2s for years. Never ever heard of a
outboard "AM Modulator". Why anyone would want to do that is beyond me.

Dan/W4NTI

Looking at my 1963 ARRL Radio Amateur's Handbook, outboard modulators
were the "in" thing back then.

--
Gregg "t3h g33k"
http://geek.scorpiorising.ca
*Ratings are for transistors, tubes have guidelines*

Gregg wrote:




11 pin Octal socket was used on a LOT of equipment in the 50/60s.

Your right tho....sounds like some sort of CB junk to me.

I used Collins S-lines and KWM2s for years. Never ever heard of a
outboard "AM Modulator". Why anyone would want to do that is beyond me.

Dan/W4NTI


Looking at my 1963 ARRL Radio Amateur's Handbook, outboard modulators
were the "in" thing back then.


Not on SSB rigs.
-Bill

-ex- wrote:
Gregg wrote:

snip
Dan/W4NTI


Looking at my 1963 ARRL Radio Amateur's Handbook, outboard modulators
were the "in" thing back then.


Not on SSB rigs.
-Bill


That's the point. If you HAD a KWM and wanted to work AM, apparently
this was the thing.

Bret Ludwig wrote:
-ex- wrote:

Gregg wrote:


snip

Dan/W4NTI


Looking at my 1963 ARRL Radio Amateur's Handbook, outboard modulators
were the "in" thing back then.


Not on SSB rigs.
-Bill



That's the point. If you HAD a KWM and wanted to work AM, apparently
this was the thing.


Uh...I was referring to the 1963 Handbook comment.

-Bill