[TMC] TMC-PAL-1k

Prem va3uma at gmail.com
Thu Mar 27 20:17:34 EDT 2014


Hello all,

This is a long delayed mail....

I had posted a few questions regarding my then newly acquired 'dead and
cold' PAL-1k - almost 2 years back.

Well, I brought it back to it's old glory (in its present form) 3 months
since posting my query.
It was put aside (moved, rather) because of other priorities.

Last week I re-commissioned it, and it is working very well. An easy 1kW
with about 15W drive from my FT-ONE.
I have the Eimac 8295A, and the i/p was swamped with a 50R DL by the
previous owner (no pre/driver).

I'll soon post some detailed PICs of the entire process of repair activity.
Here's a picture of my PAl-1k: http://www.qsl.net/va3uma/shack_big.jpg
Yes, no exciter; half the original rack is empty.

At one point I had decided to give it away, but that has now changed.
It's a keeper. I'm currently looking at ALL possibilities of reducing the
blower noise - even it it comes to lower CFM - because, when we don't
really operate at full power key-down (or AM/FM), why do we need so much
cooling ?

The Alpha 8410 uses a similar tube (4CX1000A - have a pair of NIB), but the
Orix blower they use displaces about 100cfm - for two tubes. So, a 50cfm
displacement should suffice as opposed to the current >150cfm for just one
tube.
Any thoughts, please ?

73,
Prem


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