Amp Supply LA-1000

[6Y5WW]

Is there a way to convert this amp so I can use other tubes.
i.e. G17B or G17BT.
Please supply all necessary info

[W9GB]

William -

There are a number of web sites on the Internet that you can learn about conversion of "sweep tube" ampliifers to the Russian EL-509/6KG6 sweep tube or the GI7b series triode.

Converting to Russian EL-509/6KG6 sweep tube
http://www.geocities.com/ko4nrbs/insideEL509.jpeg

EL-519 conversion schematic
http://www.geocities.com/ko4nrbs/FRI400.BMP

Conversion to Russian GI7b triode by W4EMF,
Lawson Summerrow (very good documentation)
http://www.nd2x.net/w4emf-GLA.html

N8GPQ version of the GI7b conversion
http://www.geocities.com/ko4nrbs/Finished2.jpeg

http://www.geocities.com/ko4nrbs/Finishedgi7b.jpeg

Russian Tube Data
http://www.nd2x.net/tube-1.html

Russian tubes
http://www.kvindesland.no/yl2qm/tubes.htm

W9GB

[6Y5WW]

I recently came acroos some 4cx250b tubes.
Can anyone tell me if there's a mod for the LA-1000 to use these tubes and what would be the advantages/disadvantages?