Tube equipment question
On Mar 5, 3:26 am, Mike Coslo wrote:
The simplicity was what attracted me to them. No filters, nonotch,
no pbt, no RIT, no - well you get it.
Note that the
75 meter one stops at 3.8 MHz. Heath figured that by
simplifying the output pi network to the most extreme degree,
they could save a few dollars. Coming up with a 50 ohm
antenna was the ham's problem.
The 75 meter rig I have tunes to 4 MHz. It's also a HW22a, probably a
later mod. But all that simplicity is a good thing for a lad raised
mostly on integrated circuits! 8^)
The 75m transceiver is the HW-12A. It runs 3.8-4.0 MHz. That's all
the phone band there was back when the rig was produced. There's a
mod in one of the mags--CQ, I think--that puts in a fixed silver mica
cap with a little trimmer cap in parallel for making the thing work on
both 3.8-4.0 and 3.7-3.9 MHz at the flip of a mini-toggle switch.
That'd give you a bit more room to roam.
I am now
looking at a Kenwood TS-830S. It's a hybrid, with tube finals. I
really like it so far, although I don't see it replacing my
That's a pretty good rig for its era. The matching range is limited
but it will handle 2:1 SWR without problems IMLE.
I have been pretty impressed so far. The receiver seems pretty hot,
certainly the sound is *good*. I'm listening to it right now, and it is
simply very legible. Tuning is only one speed, and a tad fast. Seems
strange just having SSB and CW, but overall I think I'll keep it.
In it's era, the TS-830 was somewhat of a DXer's and contester's dream
That receiver has an extra filter slot for cascading filters. One can
still buy after market filters for it.