Photos show Dentron MLA2500 converted to Six meters

Photo shows MLA6 packed in pickup after June 2023 DM90 trip

Starting out with new Aluminum plate floor on RF side of the Dentron MLA ampilifer

last update Feb 2023

Power supply upgrade using Harbach capacitor and diode board.

Original capacitors are removed

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

During construction the on/off switch failed! I found a E-Switch RB141D1000-116 replacement that fits and illuminates
Mouser # has these https://www.mouser.com/ProductDetail/612-RB141D1000-116

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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, Success!

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Beginnings of the air chamber around tube
These pieces were LDPE, lower melt point then PTFE, epoxed in
Don't use LDPE for material that might contact tube, temperature rating or in other words, it smells I installed a PTFE piece for that part

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Photo of air chamber build out
A Svetlana 3cx800 was used for testing
Filament voltage a 13.4Vac Plate about 2200Vdc loaded around 400ma
500 watts out

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Feb 2023

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Place holder for additional photo

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Here's picture of TS850 at V26P
During the contest 5629 qso's were made on the 850 zero on the K2
#1 world 2003 LP ARRL SSB DX
73 W5AJ
# Call Score QSOs LOW Power Class
1 V26P (W5AJ, op) 5,420,727 . . 5,629 . . 321 S B V2 NA North Texas Contest Club
2 V26DX . . . . . . 5,251,914 . . 6,186 . . 283 M2X B V2 NA Frankford Radio Club
3 6Y8Z . . . . . . 4,346,298 . . 4,878 . . 297 MS B 6Y NA Society of Midwest Contesters
4 VP9/W6PH . . . . 4,344,684 . . 4,583 . . 316 S B VP9 NA Yankee Clipper Contest Club
5 V31QQ . . . . . 3,922,539 . . 4,259 . . 307 MS B V3 NA Yankee Clipper Contest Club

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