Subj : Re: Your First SSB XMTR
To   : Holger Granholm
From : Ed Vance
Date : Thu Jun 19 2014 09:15 pm

06-17-14 10:11 Holger Granholm wrote to Ed Vance about Re: Your First SSB XMTR

HG> @MSGID: <[email protected]>
HG> In a message dated 06-13-14, Ed Vance said to Holger Granholm:

HG> GM Ed,

Howdy Holger,

EV> I was thinking the other day about You saying that You built
EV> a SSB rig in the early 1950's.

HG> Correct, this is the SSB history of Finland and the Aland
HG> Islands:

HG> History Starts here ......

HG> I have been licensed since 1951 and operated CW, AM and NBFM
HG> prior to the SSB era.

HG> I started the SSB era as OH2OJ in Finland 1955 by building a
HG> phasing exciter similar to the Central Electronics 20A using
HG> the PS-1 phase shift unit. The outboard VFO came from a BC-458
HG> surplus transmitter. With this rig I came on the air on nov.
HG> 26th 1955 as first OH on SSB. In 1956 I built a Sideband Slicer
HG> . la Central Electronics as an addition to the Geloso G-207
HG> receiver and also a 150 W Power amplifier with a 4-65A tube.

The first time I saw a Eimac 4-65A tube I was aboard ship and saw
one in a trash can where the Electronics Technician had put it after
he replaced one in a piece of gear.

I looked at the Specs. and Feel in Love with the tube.
I've never owned one of my own, but I did buy a pair of
'pulled from service' 4-125A's at a Hamfest Flea Market years ago,
and never completed the project to use them in.
-snip-
HG> END of history ---------

Thank You.

EV> I'd think You used the Phasing circuit, as the Central Electronics
EV> 10A, 10B and 20A SSB Transmitters did.

HG> The first SSB exciter/transmiter used the CE Phase Shift
HG> Network and the second used the B&W 2Q4 Phase shift network.

I'm not familiar with the B&W part.
-snip-

EV> Which made me want to ask You, does Your License allow You to use
EV> One Kilowatt of Input Power at Your QTH in the Aland Islands?

HG> Well, I could update my license to 1 kW by just requesting it
HG> but I've never felt a need for it. 100 - 200 Wo has always been
HG> enough and pse remember; being in a rare country ups your
HG> signal several db.

The most power I've used on HF was 300W but I can't remember what tubes
were in the RF Amp, and I don't have it anymore.

EV> Oh, another thing came to mind as I was writing.
EV> My first experience using a Collins 32S-1 on CW made me think that
EV> That Collins XMTR was Illegal to operate on CW because it used an
EV> Audio Tone over the Supressed Carrier.

HG> That has never been illegal here. With a well suppressed
HG> carrier the only signal you hear is carrier.

To my way of thinking the 32S-1 was running MCW (Modulated CW) which
wasn't allowed on HF frequencies in 1961 IIRC.
To me it was Tone Modulated AM with a supressed carrier and probably
with a supressed sideband.

From looking over the Kenwood TS-520S schematic it looks like that is
how CW is created in my XCVR.

One Terminal from the Key Jack goes to the "AF UNIT" pc board and then
on towards the "RF UNIT" pc board.

... I want to be a procrastinator, but I keep putting it off.
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