I had a dx35, and the voltage across the key was considerably more
than 70 volts. :)
ouch! many times!
At 11:14 AM 1/4/2012, you wrote:
>That was my first transmitter, too, Tom, a DX-35. I operated on 40 and had
>a xtal whose tripple harmonic allowed me to work 15-meters Novice band then.
>I well remember that rig and the stupid 75 volts on the cathode-key circuit.
>
>And, for Howard #3, the P2000CW was the accessible predecessor of the LDG
>talking wattmeter, except its output was in CW and considerably more
>accurate.
>----- Original Message -----
>From: "Tom Behler" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Monday, January 02, 2012 3:15 PM
>Subject: Re: Monitoring our CW Signal with Older Rigs
>
>
> > Mike:
> >
> > It's all coming back to me now.. Your first approach is exactly how I
> > monitored my CW note when transmitting. I had an old rock-bound Heath Kit
> > DX35 transmitter, and a Lafayette receiver whose model number I forget,
> > and
> > made many CW qsos that way back in the day.
> >
> > Thanks for jogging my memory here.
> >
> > 73 from Tom Behler: KB8TYJ
> >
> > ----- Original Message -----
> > From: "Mike Duke, K5XU" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Monday, January 02, 2012 2:49 PM
> > Subject: Monitoring our CW Signal with Older Rigs
> >
> >
> >> For Tom, and anyone else who has become curious about this subject
> >> after hearing that amazing combination of chirp and very raw note that
> >> I posted:
> >>
> >> Until Novice operators could use the full featured rigs such as the
> >> Kenwood TS520 and Yaesu FT101, the way most of us monitored our CW
> >> signal as Novices was to simply not mute the receiver, and back the RF
> >> gain control down to a very low setting when transmitting. Thus, we
> >> heard our transmitter more or less as it sounded to everybody else. I
> >> say more or less because if you happened to have a ground loop, or let
> >> your receiver get overloaded by your transmitted signal, you could get
> >> some false indications that were really problems which were local to
> >> your shack, and were not actually being transmitted for the rest of
> >> the world to hear.
> >>
> >> The Heath HW16 Novice transceiver had a built in side tone for
> >> monitoring purposes, but that side tone sounded pretty awful. To clean
> >> up that problem, many people simply removed the neon bulb from the
> >> side tone circuit, and were then able to monitor the HW16 transmitter
> >> through the receiver. This also made it easier to get the receiver and
> >> transmitter on the same frequency.
> >>
> >> There were also numerous circuits which were designed specifically as
> >> external CW monitors. My mention of finding one of those solid state
> >> ice cube size monitors from the late 1960s a few months ago prompted a
> >> few messages on this list about various monitor circuits.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Mike Duke, K5XU
> >> American Council of Blind Radio Amateurs
> >>
|
