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Dave Hockaday
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WB4IUY Ham Since 1974
United States

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I enjoy rag chewing, contesting, digital work, vintage radio & restoration, building, etc... about every facet of this awesome hobby! Check out some of my other pages at:

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Repairing the Icom IC-211


8/9/2019 5:52:21 AM (2 comments) Add a commentAdd Comment

This was another late sleepless night project... Back during this past winter, I accidentally blew the receiver sensitivity out of my old Icom IC-211 2 meter SSB rig while operating on 160 meters at full power. I never turn the IC-211 "off"...maybe a mistake. The 160m antenna is up on the tower at about 100', the 2m SSB antenna is about 15' above that. I've left the 211 on 144.200 for years, no matter what other band or power I was running...but that roll of the dice finally caught up with me.

I broke the rig open and started poking around. It had slowly developed a short list of problems, but nothing that stopped it in it's tracks like this blown front end. Using my signal generator, I capacitively coupled a signal on 144.200 mhz into the 1st RF amp stage. I found I had plenty of system gain when the signal was injected at the drain, but almost no gain when injected at the gate. A quick voltage check proved there was almost no current flowing in the device when signal was applied. It seems that the old 3SK40 dual gate N-channel FET in the 1st RF amp stage that was toasted.

Junk box time!! I dug around in my workshop a bit, to try and locate something suitable from 35+ years ago.. That's an old part from the 70's, but I had 1 piece of ELM222 (similar device) in my parts bin (much to my surprise!). I removed the old dual gate n-channel FET and soldered it in. I set up the signal generator, opened the service manual PDF, and gave it a full alignment. Wow!! Sensitivity was a little better than before, and I was very surprised as how hot the receiver in this 40 year-old radio is. I have a bunch of service manuals and such online for my own use, to minimize paper, and in case someone else needs them. You can find them at .

While it was open I replaced the dial lamps, cleaned the optical chopper in the VFO (the VFO operation was a little erratic), and sprayed out the controls.

She's back in the shack and VHF contacts like nothing ever happened. It's definitely receiving better than before, and working pretty darn good for a 40 year old radio!


Read the 2 comments after the break below.


by WA7DUY 9/6/2019 1:47:47 PM

What did you use for replacement dial lamps? I just acquired a IC211 with "typical problems" (whatever that is). The one show stopper is that the dial does not change frequency unless I hold in the dial speed button. Then it works. Is that a typical problem? What is the cure?

by WB4IUY 11/11/2019 8:20:07 PM


I used a pair of small 12 vdc "grain of wheat" lamps I had in my lamps inventory for the dial lamps. When I'm at hamfests, I typically watch for things like that and buy them to keep on hand, since those little lamps were never that dependable.

As for the dial, google "IC-211 Tuning Problem". There's a number of known problems with this model. I did have a VFO problem when I first got the rig, and tracked it down to bad solder connections on the VFO PCB.


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