I have received quite a few requests for info on my simple mod to 
put my Heath SB-1000 on 6 meters. Here's how I did it.

With the aid of my MFJ 259B and a bit of research using the ARRL 
Handbook chapter on Amplifiers and more than one note to Mr. 
Measures, I came up with this:

Input pi network: 33pF on rig side, 1  turns on 10 meter slug 
(iron core all the way out) and 10pF on tube side.

Output network: Move 10 meter tap out towards the tune cap until 
there is 1 turn left between your tap point and the tuning cap 
(about 1  turns).

With 80 watts input (Icom 551D) I get 725 watts output into a non
radiating load. On air reports indicate clean audio, clean signal.
Tuning is touchy in that small adjustments make big differences 
very quickly as opposed to the more relaxed rate of tuning on the
lower bands. I still have full functionality on 160-15, the way the
amp was designed originally. I only lost(?) 10 meter capability.

Parts required for the mod: 1 10pF 500V and 1 33pF 500V capacitor 
available from Mouser for about $.80 each. I spent $300 for the 
amp at the HossTraders spring meet so I have nearly a King's 
ransom in it now ($301.60!!).

Hope this info proves useful to the reader.
John Wilcox  NS1Z
FN44rn
ns1z@agate.net
fon: 207-364-2246

871 Route 120
Rumford, ME 04276-3836
