On 12/10/2011 04:32 PM, Edward Knobloch wrote:
On 12/10/2011 10:59 AM, Myron A. Calhoun wrote:
'Way back in 2003, Dick Carroll posted a note in this group saying he
could scan a 4-page article starting on page 60 of the January, 1957,
issue of CQ magazine which showed a 4-tube CW transceiver.

I'd sure like to receive a copy of that article.

--

Hi, Myron

Here's the article:

https://rapidshare.com/files/1917089...ewer.pdf?bin=1


(If the address wraps around, just highlight the whole thing
before clicking on it.)

It looks pretty good, except I would use a power transformer
to avoid the shock hazard.

I checked the December 1957 CQ yearly index,
and there was no reference to any corrections
to this article, so it should be good to go.

73,
Ed Knobloch

Interesting minimal rig. The voltage tripler supply looks a little
fishy, there should be three diodes in a tripler (the two in series
count as one), though he DOES have three capacitors. I would use a
power supply with a conventional full wave rectifier myself. I guess he
was limited for space. Still the transformerless supply will be safe if
the chassis is grounded to a true earth ground and the hot side is
fused. (Might have a bad hum problem though).