EPT style frequency counters

[Hawkeye351]

Got a question about these export radios with frequency counters, specifically the EPT style counters.

Is there a list of which frequency counters work in which radios?

Example:
I had a friend's 2980 on the desk a year or so ago and the frequency display was blank. Well I took mine out of my Saturn (same main board with same identical looking module mounted vertically behind display) and it worked, so I've just been running mine without a freq counter.

Well, I've been going through old used modules I have accumulated over the years from many different export rigs but can't seem to find one that will work (although the plugs are identical). I've recapped each one, replaced the regulators but none will work in my Saturn.

I've tried 99v, 88hl, 55v, 11b modules and still just a blank display, but it worked great before I yanked mine out and gave it to someone else.

Which frequency counter module board numbers go to which radios?

I should never have yanked my personal module out for someone else, my stupidity.

 

[w9cll]

EPT?

 

[Hawkeye351]

Yea, like the 99v comes with two different versions of EPT frequency counter modules that will work with it.
The EPT210014B and EPT210014C frequency counter module board numbers are listed as being compatible with the 99v.

I need the frequency counter board numbers that are compatible with the Galaxy Saturn style rigs. A 99v module won't work in a Saturn, neither will a 55v, 88hl frequency counter module in a Saturn.

I just need to know which frequency counter module board numbers are compatible with the old Saturn rigs with the vertically mounted frequency counter modules.

I should have wrote down the module number that I yanked out of mine.

 

[Eldorado828]

Yea, like the 99v comes with two different versions of EPT frequency counter modules that will work with it.
The EPT210014B and EPT210014C frequency counter module board numbers are listed as being compatible with the 99v.

I need the frequency counter board numbers that are compatible with the Galaxy Saturn style rigs. A 99v module won't work in a Saturn, neither will a 55v, 88hl frequency counter module in a Saturn.

I just need to know which frequency counter module board numbers are compatible with the old Saturn rigs with the vertically mounted frequency counter modules.

I should have wrote down the module number that I yanked out of mine.

 

[Hawkeye351]

That looks like the one that goes in a Saturn that has the horizontal frequency counter module mounted on the right side of the chassis. That one has only two connections.

The one I need mounts vertically behind the frequency display. Mine has 4 connections, two small on one side and two large on the other side.

 

[Hawkeye351]

Mine is laid out just like the 210014C, the one that comes in the 11B. But even the 11B counter won't display in my Saturn. All I did was unplug my counter module and put it in another, I didn't yank any wires out of the connectors.

On the 210014C modules I do have, I've recapped them, and replaced the 7805 regulator, still no display at all. The 210014 doesn't have any diodes on them (the typical 2.4v diode that leaks and causes this issue).

 

[nomadradio]

the frequency display was blank.

Sounds like the SMT resistor poof. The 7805 will show around a Volt on the input pin. Thought I had a pic of the fix on my ImageShack account, but I can't find it. Those folks have developed some twitchiness in their database. The gist of it is pretty simple. Find the pin that feeds main power into the module. Slide sleeve over one lead of a 47 ohm 1/4Watt resistor. Solder that end to the solder pad under the power supply pin. The other end of the resistor goes to the input pin of the 7805T.

We have fixed more than a few "dark" counters in 2980, 2517 and late-production Saturn radios this way.

Best of luck and 73.