I uploaded the manual for the mark ii and iv to:

mods.dk

Willis
WD4CHP

I have three similar meters that look alike but with different names. Probably made by the same manufacterer.

I think I paid about $5 at the most for each used.

They all read the same so they are within specks.

They are good for a quick look but they aren't a Bird.

If you can find a TenTec model 1202 Dual Band Wattmeter, it does a good job.

It requires an internal 9 volt battery or external power 9-14 volts.

I found mine for $20.

HeathKit might start with their original kit.

A homebuilt aircraft. Full size.

I do not worry about the WHY.

If the manufacturer says to use 2 fuses, I use 2.

There must be a good reason.

If you really want to know, then ask the manufacturer.

K0CWO


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The last ones I bought I got at Radio Shack not long ago.

Check if they are still in stock in a store near you.

I have had no problems with AES Orlando.

If I order before 10AM I get what I ordered the next day.

I have never had that service with HRO.

You will find a pdf of the manual here.

http://www.mods.dk/manual.php?brand=_other

Here it says that the SM-2 use4s an 8 pin plug.

http://www.universal-radio.com/catalog/mics/sm2ic.html

GOTO mods.dk.

The service manual can be downloaded there.

sry about the last reply, I couldn't resist.

Are you sure it is a HTX-212?

The 212 is a mobile rig and you can connect it to any 12 volt battery.

I have an atlas 210, 210x and a 215x.

I found a project board a RadioShack that plugged into the sockets on the main board. I also found the sockets there. I made a standoff board. It made troubleshooting a lot easier.

The 210x was an outstanding mobile rig coupled to an origional Outbacker antenna.

It is better a lot better to be "aging" in ham radio than the alternative!

 

The question is "What year?"

Years ago, before the SMA connectors, I used a mag mount that had a BNC connector on the base and the cable.

All you had to do was put the rubber duck antenna on the mag mount and connect the cable to the HT.

It was great for temporary applications.

I think I still have it somewhere.