W5AJ Six Meter Conversion

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MLA2500SIX

This web page is under construction - slowly being built (converted from prior page) as MLA2500 is converted to Six meters

last update 10 April 2022

This is start of power supply upgrade using Harbach capacitor and diode board.


Original capacitors are removed


The SSB/CW relay will be removed, only 800V winding will be used with 3cx800 tube


That relay switches two HV taps from transformer and can be seen in lower right of photo
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The Harbach diode/timer board
A warning, The timer maximum setting is 120 seconds
A 3cx800 requires 180 seconds

labeling on diode board "T" = top "B" = bottom


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New Power Supply boards installed and SSB/CW relay removed


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close up of connector on meter switch PCB


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Inital install of Pi network coil



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9 April 2022 finishing up HV on power supply with new capacitor/diode board. 2400 Vdc no load!




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Beginnings of the air chamber around tube
Teflon (these pieces were LDPE, different but OK) epoxed in
taking break for room to air out after leaving it closed up overnight.


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Text place holder






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9Apr2022


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Here's picture of same TS850 at V26P
During the contest 5629 qso's were made on the 850
#1 world 2003 LP ARRL SSB DX
73 W5AJ


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have fun and GL with the DX

CQ CQ CQ