CAT 22 Test and Fix-it

Information about Part 1 of CAT 22 - including the BATC General Meeting
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G8GKQ
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CAT 22 Test and Fix-it

Post by G8GKQ » Wed Aug 03, 2022 3:22 pm

Hi

I am just putting together the equipment that I will bring for the test and fix-it bench at CAT 22 this Sunday.

I plan to bring enough gear to test and diagnose most faults in Portsdown and Ryde equipment. I will also be able to give an indication of the Power Output of transmitters (up to 100W from 50 MHz to 10 GHz) and estimate (+/- 2 dB up to 24 GHz) the noise figure of receiving equipment.

There should be a QO-100 IF feed available for receiver testing.

If anybody has any very specific requests for testing, please post them here.

Remember to bring power supplies and all connecting leads (power and RF) with you as sometimes the faults are in the power supplies or the connectors!

Dave, G8GKQ

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M5TXJ
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Re: CAT 22 Test and Fix-it

Post by M5TXJ » Wed Aug 03, 2022 3:25 pm

Hi Dave,

Would it be possible to test my POTY (TX side)?

Thanks, t'other Dave.
...are you sure I can't use a pair of 813's?... :shock:

M0YDH
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Re: CAT 22 Test and Fix-it

Post by M0YDH » Wed Aug 03, 2022 8:12 pm

PSU fluctuations and effects on the Pluto., Dave please. Trying to make the Pluto less prone to being not found a few minutes after it reported the firmware status.
Regards
David M0YDH

G8GKQ
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Re: CAT 22 Test and Fix-it

Post by G8GKQ » Thu Aug 04, 2022 10:36 am

Dave M5TXJ - I have asked Mike G0MJW to bring his VNA to check your feed. Much better to have the expert check it for you.

David M0YDH - not sure we'll be able to cure your Portsdown Pluto woes, but it will certainly be useful to monitor voltages and what else is going on while we reproduce the problem. That might lead us towards a solution.

Dave, G8GKQ

G6GZH
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Re: CAT 22 Test and Fix-it

Post by G6GZH » Thu Aug 04, 2022 2:12 pm

I shall bring my POTY for a check on the VNA

I'll also bring a Spectrian 2.4GHz PA which I've tried on the bench with a bit under 1W drive which is not enough to get get full power out (I think I'm getting about 10W out, though it's labelled as having 16dB gain) so if anybody has something which can drive it harder I'd like to find out what it can do and thus what I need to drive it.

David

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