I have been getting reports that the HM-36 shipped with the IC-7200( IC-718, IC-7600, IC-7700, IC-7800) is low and muffled. I obtained one and the reports are absolutely right. It is the "Chinese" HM-36 (check the rear of your mic) that is the problem. The Japanese one is alright.

There are a few mods out there to improve it, but they still use the stock
element. I installed my type #2 element - the one I use in the HM-151 for the IC-7000 - and the HM-36 came to life. The difference is obvious. The
frequency response opens up. It goes from muffled to clean and robust.

The upgrade is actually more complex than the one for the HM-151. This is because the DC biasing resistor is incorrect as well in the HM-36. This means that the resistor, the coupling cap and the element have to be replaced. I replace the coupler cap with a SMD surface-mount unit.

I know you have other options (on-line mods), but I can guarantee that
if you use my Type #2 element, you will have much better audio.
(check my reviews : http://www.eham.net/reviews/detail/6580)

I'm setting the price at only $39.50 plus shipping. Insured Priority 2-3 day return shipping is $7.50, so the total is: $47. Ship it to:

Bob Nagy
121 Rainwood Ter.
Pearcy, AR. 71964

Stock HM-36 - Chinese manufacture

HM-36 with AB5N Type #2 Element

Recording Conditions:

I used a FT-897D as the receiver (7600 for TX). I set the stock microphone for a S-5 signal coming in. When the element was changed, it had enough increased drive to give a S-9+ signal at the same mic level. The RX AGC then kicked in, lowering the background noise. Rather than lower the record volume, I just left it as it was- to show you the difference in drive. My observation is that the Type #2 element does these things:

It increases audio drive by about 50%
It has more clarity over the entire range - opening up the sound.
It has a considerably more present and articulated audio.

It isn't as dramatic a difference as on the IC-7000's mic - because the HM-151 on the IC-7000 is a much worse performer. On the HM-36 Chinese edition, this is a nice upgrade for use with the Icom radios it ships with.

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Bob Nagy - AB5N - 121 Rainwood Ter. Pearcy, AR. 71964

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