----- Original Message -----
From: "Garey Barrell" <[email protected]>
To: <[email protected]>
Sent: Friday, June 17, 2011 8:22 PM
Subject: Re: [Drakelist] Sidetones (was Ten-Tec and Drake
Compared)
Darrell -
Most equipment sold before the early 1960's was NOT
'integrated'. I would say the vast majority of ham
stations had a receiver made by one company and a
transmitter either homebrewed or made by another company.
Johnson and WRL didn't make receivers, and National and
Hammarlund didn't make transmitters. There were
exceptions, but most did one or the other.
Just about all receivers had a pair of terminals that had
to be shorted to activate the receiver if the front panel
switch was in STANDBY, and just about all transmitters (or
their associated antenna relays) had a pair of contacts to
control the receiver.
Most electronic keyers had monitors built into them, and
Bud and a few others made external boxes that sensed RF
and generated a sidetone. A lot of us would listen to the
transformer hum when the transmitter was keyed as our
'monitor'.
Collins radios were among the first to be 'integrated'
with receivers and transmitters designed to work together,
but even those didn't ALL have sidetone.
On the other hand, once the S-Line, Drake 4 Line, Heath SB
pair, etc. came along, everything was working together and
sidetone was standard.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
That is something that had not occured to me believe it
or not. I think that Collins was probably the first to
"integrate" their equipment, especially the 75A and 32V
series. The first two versions of the 32V did have side
tone, it was dropped in the 32V3 supposedly because they
could not get sufficent TVI suppression with it.
All of the big three made transmitters at one time or
another, especially National for the Navy, but only
Hallicrafters made them as a main part of their catalogue. I
think all of these were crystal controlled TX with no VFO
being offered. There _were_ some separate VFO's, the
Meissner (Sp?) Signal Shifter being one of the earliest.
Hallicrafters eventually offered a VFO that could be used
with a variety of rigs or as a stand alone exciter. I am not
sure when the Viking Ranger came out first but it had a
built-in VFO and was complete in one package.
Collins OTOH, did not make ham or general coverage
receivers before the end of WW-2 although they made special
purpose receivers for point to point and aeronautical use.
--
Richard Knoppow
Los Angeles
WB6KBL
[email protected]
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