Icom IC-2100H 2-Meter Mobile TX Power.

[KT4JX]

The power settings are 5/10/55 watts. I'd much rather have 10/25/55. Is there any way to adjust this easily with the golden screwdriver and a cross-needle SWR meter?

Thanks.

[WD4CHP]

Get a maintance manual and follow the alignment procedures.

[KE3WD]

The power settings are 5/10/55 watts. I'd much rather have 10/25/55. Is there any way to adjust this easily with the golden screwdriver and a cross-needle SWR meter?

Thanks.

Doubtful, as the levels are typically derived using fixed resistances and only the the top level is adjustable - and should never be adjusted above manual spec as to output.

Besides that, the amount of power difference you desire would be minimal at the other end, due to log10 nature of the thing. Far better to look into a gain antenna as the best solution.


73

[WB2WIK]

With that particular rig it would take a lot more than a screwdriver.

The power settings are by virtue of surface mount resistors and not adjustable (no "pot" controls). The 2100H also has no service manual as far as I can tell. I had one years ago and even called Icom asking about a service manual and was advised that it, like many other small mobile rigs having virtually no "user serviceable components inside," never had one.

5/10/55 were actually pretty good choices: 5W to conserve the battery used or for very long transmissions; 10W to increase that by 3 dB; and 55W to increase it by 10 dB. When used in a motor vehicle, which is the intended use, I always just used 55W all the time for everything, since with the engine running lots of current is available. For the QRP category in Field Day, I used 5W. Hardly need anything in between that.

There are some more "deLuxe" rigs that have the intermediate power levels adjustable, but the 2100H was designed to be a "rock-bottom price" rig and every single component has cost. Surface mount resistors cost less than one cent each. An adjustable one could cost close to a dollar -- HUGE difference.

[KT4JX]

Fair enough. Thanks!

[WD4CHP]

I had a Icom IC-2100H. When I sold it I included the service manual.

I bought the service manual from Icom.

Don't take any static from Icom. It took 2 years of nagging to get a service manual for the IC 290H.

[WB2WIK]

I had a Icom IC-2100H. When I sold it I included the service manual.

I bought the service manual from Icom.

Don't take any static from Icom. It took 2 years of nagging to get a service manual for the IC 290H.

Can you upload the 2100H service manual? I don't have one anymore, but this might be a good service for others who still do.

There's no service manual on their website in the "discontinued model" section, and they told me there wasn't one!

[KT4JX]

Found 2 different versions of it:

Here.

And Here.

Say, has anyone noticed how the volume and squelch knobs tend to wobble when you use 'em? It makes it feel like they're gonna come loose some day or get you a cold solder joint. I wish they could have built 'em more solidly in place.

[WD4CHP]

SRY I don't have the manual any more.

Just keep bugging them. Eventually They will come around.

[WB2WIK]

Found 2 different versions of it:

Here.

That's great! I did download the manual and it does appear the only "power level" adjustment is for "high power" (55W) and there isn't any adjustment for the lower power settings. Which is what I thought, but the SM confirms it.

Still handy to have, though!