[Elecraft] HW-16 Re: Latest Elecraft NEWS

[John Simmons]

Speaking of 110VAC antenna relays, I reached in the back of my Novice 
rig and touched the bare 110VAC contacts on the antenna relay. Youch! I 
was a little more cautious after that. Bare contacts wouldn't be allowed 
today in commercial gear.

73,
-John NI0K

> John Oppenheimer <mailto:john at kn5l.net>
> Saturday, January 26, 2019 4:03 PM
> Took a look at Heath's HW-16 design. Quite ingenious: Using the PA
> cathode bypass capacitors and current through a diode to shunt the
> receiver front end during transmit. Early diode QSK operation. And a
> neon bulb relaxation oscillator, using grid block keying voltage, for CW
> sidetone.
>
> I enjoy putting vintage stuff on the air for SKN. Heath did not
> integrating their separates well back in the day, relying on 110V
> antenna relays. I may have some DX-60A/HG-10B/HR-1680/HS-1681 ideas for
> next year!
>
> John KN5L
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> Charlie T <mailto:pincon at erols.com>
> Saturday, January 26, 2019 12:53 PM
> The first of that type was, I believe a Hallicrafters SR-75, which was 
> quite
> unique for its day.
>
> If I remember correctly, it was basically an S-38 receiver that used the
> audio output tube as a single stage crystal oscillator & RF out function.
> Not what you'd call a stellar performer, but it was a first and
> self-contained in a package which was same size as the S-38.
>
> 73, Charlie k3ICH
>
>
>
>
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> <elecraft-bounces at mailman.qth.net> On
> Behalf Of Kevin Anderson via Elecraft
> Sent: Saturday, January 26, 2019 9:13 AM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] HW-16 Re: Latest Elecraft NEWS
>
> Hopefully not to belabor this too much (or exceed a cutoff on the
> conversation), the HW-16 was not a transceiver in the modern sense of 
> shared
> circuitry throughout, but was a transmitter and receiver in the same 
> cabinet
> that shared the same antenna connection and had the necessary cutoff and
> receiver protections on transmitting. The knob and dial you see is the
> receiver. The transmitter in the radio was CW-only, rock-bound on 80-40-15
> meters only when barefoot with just the HW-16. It took the external HG-10
> or -10B VFO (or similar grid-keyed VFO) to get you flexible 
> transmitting not
> involving crystals. The receiver circuitry was on a circuit board in one
> half of the case and the transmitter circuitry was point-to-point 
> wiring in
> the other half of the cabinet.
>
> A used HW-16, joined later by a HG-10B VFO, was my first radio when I got
> licensed in 1993 and used for a couple of years until it got upscaled by a
> used Ten-Tec Century 22.
>
> Cheers/73,
> Kevin, K9IUA (then KB9IUA from 1993 until 1999)
>
> ---------------------------------------
> Kevin Anderson, Dubuque IA USA, K9IUA
> k9iua (at) yahoo (dot) com
> ---------------------------------------
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> delivered to pincon at erols.com
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> Kevin Anderson via Elecraft <mailto:elecraft at mailman.qth.net>
> Saturday, January 26, 2019 8:12 AM
> Hopefully not to belabor this too much (or exceed a cutoff on the 
> conversation), the HW-16 was not a transceiver in the modern sense of 
> shared circuitry throughout, but was a transmitter and receiver in the 
> same cabinet that shared the same antenna connection and had the 
> necessary cutoff and receiver protections on transmitting. The knob 
> and dial you see is the receiver. The transmitter in the radio was 
> CW-only, rock-bound on 80-40-15 meters only when barefoot with just 
> the HW-16. It took the external HG-10 or -10B VFO (or similar 
> grid-keyed VFO) to get you flexible transmitting not involving 
> crystals. The receiver circuitry was on a circuit board in one half of 
> the case and the transmitter circuitry was point-to-point wiring in 
> the other half of the cabinet.
>
> A used HW-16, joined later by a HG-10B VFO, was my first radio when I 
> got licensed in 1993 and used for a couple of years until it got 
> upscaled by a used Ten-Tec Century 22.
>
> Cheers/73,
> Kevin, K9IUA (then KB9IUA from 1993 until 1999)
>
> ---------------------------------------
> Kevin Anderson, Dubuque IA USA, K9IUA
> k9iua (at) yahoo (dot) com
> ---------------------------------------
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to jasimmons at pinewooddata.com