RadioBanter - Help on General Microwave Bolometer 476

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Gian, I7SWX

September 26th 06 11:04 AM

Help on General Microwave Bolometer 476

Hi all,

a good friend of mine in IT9 (Sicily) has a very nice General Microwave
Bolometer model 476. By mistake he applied too much power and ...
voila' ... the "476 head" failed.
He has now at least 8dB error. He would like to repair replacing the
TFT element that now has 180 value versus the expected 150 ohm.

The Head is model 42040A ok for up to 20GHz.

Thanks for your help

73

Gian
I7SWX
W1-I7SWX
F5VGU

Gian, I7SWX

September 26th 06 08:42 PM

Help on General Microwave Bolometer 476

The Bolometer Head is 4240A (and not 42040A)

Thanks and 73

Gian, I7SWX

wrote:
Hi all,

a good friend of mine in IT9 (Sicily) has a very nice General Microwave
Bolometer model 476. By mistake he applied too much power and ...
voila' ... the "476 head" failed.
He has now at least 8dB error. He would like to repair replacing the
TFT element that now has 180 value versus the expected 150 ohm.

The Head is model 42040A ok for up to 20GHz.

Thanks for your help

73

Gian
I7SWX
W1-I7SWX
F5VGU

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