[WIham] Working on a Heathkit HW-202

[Tom]

Hey all,

I pulled out a Heathkit HW-202 rockbound  (6 
sockets rx, 6 tx) radio that I had been given 
years ago. It didn't work, but the main problem 
wasn't in the radio, it was in the matching power 
supply, which had a bad solder joint. Oh, and the 
radio also has an open in the + power lead.

Anyhow, it receives (static) really good now.  I 
metered the current draw on receive and it's in 
spec. Haven't dared trying to key up yet (because 
I don't have a mic, and besides, it's a little scary.)

Does anyone have any crystals for simplex freqs 
collecting dust, that they care to donate? The 
book says they are HC-25U type. Is that the size and pin spacing?

I'm trying to puzzle out what the crystals that 
are in here were for.  You can select any RX 
socket and any TX socket and mix/match, but I 
still don't understand what the previous owner 
did here.  Part of the problem is that the rocks 
are partly marked for the ultimate frequency they 
are meant for, and partly marked for their actual 
frequency. For example, the transmit crystals are 
all 6.1-something MHz, which you multiply by 24 
to get the operating frequency. The Rx rocks are 
all 45.2 to 45.6 MHz, and you add 10.7 MHz and 
multiply by 3. Or something. Not sure I have that right.

But trying to puzzle out if I can even transmit 
and receive with what I have is confusing.

Rx1 146.940    Tx1 146.940
Rx2 empty      Tx2 146.460, I think?
Rx3 146.760    Tx3 146.760
Rx4 empty      Tx4 empty
Rx5 unknown?   Tx5 147.456
Rx6 empty      Tx6 empty

So Rx1 and Tx1 are the output of a repeater in 
Madison, but the input should be 146.340?? There 
doesn't seem to be a way to transmit on that F.

Then I find that Rx3 and Tx3 seem to be another 
Madison area output, but shouldn't the input be 
146.160? No crystal for that here either.

The crystal in Rx5 isn't marked with anything I 
can make out.  It says CTS Knights, CH-5T, A20M. 
Is "CH-5T" a channelized designation for some simplex frequency?

Tx5 seems to be some oddball simplex frequency.

The other problem I have is that I don't have a 
mic for it. I have the top of a D-104 (no stand 
or PTT) and assorted CB mics laying around, would one of those work?

TIA es 73 de N9QQB





226 . [Commentary] Today's solutions are 
tomorrow's problems. --Bruce Sterling at the 
American Center for Design "Living Surfaces" 
Conference, San Francisco, October 1994
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