Micor B93 Base/Repeater Power Amplifer - modification?

[wb0qqk]

I'm curious to know if anyone is operating a 375 watt
150 - 162 mHz. range Micor station on two-meters and
what (if any) modification is required to make it perform
properly at 145 mHz?

[MSS-Dave]

Friend of mine has one of these he uses on the bottom end of 2. Far as I remember, it tuned up fine. Uses it on sideband too, seem to remember he was able to adjust the bias to run it linear. Looks real good on a analyzer too. I'll shoot him a e-mail and ask for comments. I'll post to the board as well.

Dave

[007]

We are running a 425w VHF Micor amp at 300w on 145 MHz...tunes right up with no issues.

[MSS-Dave]

I'm curious to know if anyone is operating a 375 watt
150 - 162 mHz. range Micor station on two-meters and
what (if any) modification is required to make it perform
properly at 145 mHz?

Here is the response from my friend.........

I didn't do any mods to it except put a 3db attn on the input. It helped the input matching somewhat. Just retune it for the freq and watch the metering. I was able to even run it on SSB by increasing the screen voltage (via the front panel control) to the point the tubes showed idle current. It looked linear on the scope and on air reports were good (no splatter or popcorn up the band). The one I used was originally used around 151 mhz for IMTS.


Hope this helps!

Dave

[wb0qqk]

Thanks for all of your responses.