[Central-Electronics] Another 200V back to life

[k7fm]

My opinion:

"I am using a Shure 444 mic, would the Astatic D104 be a better choice for 
this xmtr?"

Depends upon your voice.  Try each one and take a vote.  Remember this is a 
democracy.  However, if 99% of the people say one mike is better and 1% like 
the other mike, you can select the one that 1% like.  Remember, you are king 
in the radio room.

"I removed the audio limiter and replaced it with the jumper as suggested by 
some; However, could not get any output so I re-installed the limiter and it 
works fine.  Bob said that I was one of the lucky ones that have a limiter 
that works. I still wonder though as to why the jumper did not work."

The jumper was on the wrong pins, and did not jump.  Stood on the ledge and 
promised to jump, but did not and disappointed the crowd.

"I had lubricated the fan but it still seems quite noisy, is this normal and 
if not has anyone had any luck finding a replacement fan that fits in the 
space as designed."

I found a replacement from a scrapped Tektronix oscilloscope.  Build a new 
bracket and a muffin fan will work fine, though have a different appearance.

"I am still having fine tuning dial problems but will address that at a 
later time."

You may need to service the bearings and clean and lube.  Nick Tusa has info 
on how to do this.

"Also, has anyone come up with a way to actually meter the speech level 
without having to interpret the light?"

Meters are very poor at metering speech, because their reaction time is too 
slow.  A neon light is excellent - you just have to follow the book.  Also, 
an oscilloscope is excellent to monitor the waveform.  Inexpensive surplus 
scopes are available for almost nothing.

Good job on getting the 200V back on the air.

73,  Colin  K7FM