Marconi 2022E low output level - UK Vintage Radio Repair and Restoration Discussion Forum

TonyGrim · 17th Aug 2017, 1:03 am

Hi,

I've just replaced the 500-1000MHz doubler hybrid (OM-345) with a substitute sourced via eBay. This was to address a problem with the output levels in the 500-1000MHz range being down in the dirt. I appears to have worked, but now I find that output levels across the entire range of the sig gen top out at -5dBm. I've obviously done something silly on the RF processing PCB, but I'm having trouble discovering just what. Any ideas from the Mi2022 gurus would be greatly appreciated.

Another matter, unrelated to this one, involves the "second function" rf level calibration. When I enter the appropriate key code and go to 2nd function 192 - the rf level cal - all I see displayed is --- in all areas of the screen. I am unable to select a frequency range or enter calibration data. Why?

Thanks folks,

Tony

Marconi_MPT4 · 19th Aug 2017, 4:49 pm

Hi Tony,

Might be worth looking at Marconi Test Instruments site at Yahoo Groups, however you need to become a member. Link as follows:

https://groups.yahoo.com/neo/groups/...struments/info

Rich

17th Aug 2017, 1:03 am	#1
TonyGrim Triode Join Date: Feb 2016 Location: Auckland, New Zealand Posts: 15	Marconi 2022E low output level Hi, I've just replaced the 500-1000MHz doubler hybrid (OM-345) with a substitute sourced via eBay. This was to address a problem with the output levels in the 500-1000MHz range being down in the dirt. I appears to have worked, but now I find that output levels across the entire range of the sig gen top out at -5dBm. I've obviously done something silly on the RF processing PCB, but I'm having trouble discovering just what. Any ideas from the Mi2022 gurus would be greatly appreciated. Another matter, unrelated to this one, involves the "second function" rf level calibration. When I enter the appropriate key code and go to 2nd function 192 - the rf level cal - all I see displayed is --- in all areas of the screen. I am unable to select a frequency range or enter calibration data. Why? Thanks folks, Tony

19th Aug 2017, 4:49 pm	#2
Marconi_MPT4 Heptode Join Date: Mar 2011 Location: Dorset, UK. Posts: 521	Re: Marconi 2022E low output level Hi Tony, Might be worth looking at Marconi Test Instruments site at Yahoo Groups, however you need to become a member. Link as follows: https://groups.yahoo.com/neo/groups/...struments/info Rich __________________ To an optimist a glass is half full; a pessimist half empty; an engineer twice as big as need be!