Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Steve -
The DX-20, like many of the small transmitters of its type, is cathode
keyed. What this means is that while the voltage across a key is
positive related to ground, the "open" key voltage can be several
hundred volts, and the full cathode current of the oscillator and final
have to pass through the keying device.
Definitely a place where a KEYSALL or similar is going to be required
for most modern keyers. The HA-1 will handle it, with the appropriate
snubber network.
The Idiom Press keyers will not SAFELY key this transmitter without an
interface.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
Steve Berg wrote:
Steve Berg <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I appreciate the information this thread has produced. I have
forwarded some of it to a friend who I recently gave an old Heath
DX-20 that he is going to pair with his R4C. Myself, I also do not
like iambic keys. I have two Vibrokeyers, one jeweled and one not,
and I use them with an MFJ keyer and a trusty Hallicrafters TO keyer.
I prefer the Hallicrafters unit, but warn people to be sure to replace
all of the capacitors in the unit. Those old Black Beauty tubulars
were junk when new, and they cause all sorts of problems in the keyer
when they start to leak. The electrolytics will blow out and take the
power supply components with them. Once these are replaced, the unit
gives great service. Then, there is my old Vibroplex Champion bug.
That is another keeper. I still have the only remaining part of my
novice station which is a Johnson Speed-x straight key, but rarely use
it due to grad school induced carpal tunnel problems. Much of my
operating is done with CW. Preferably with vacuum state equipment.
Steve WA9JML
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