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Date Posted by Category User IP

2012-01-29 (UTC)


HF Amplifiers

Heathkit SB-220 Linear Amplifier

I have for sale a nice Heathkit SB-220 Linear Amplifier.
I have had my buddy check it out and heres what he had to say or did

"to make it in fine working order.
From Tom: Fan Motor Replaced
Resoldered Plate meter lead
Assume previous owner sold amp because of burned out fan plate
meter no longer worked.

Attached new AC Plug for 115 Vac
Kept origional 220 Vac jumper
attached with paperwork

As per manual the 3-500z will show a dull Red when driven to full output
per duty cycle. This is normal as per manual. If tube plates show a bright orange or yellow stop and look at tuning and drive level

Because of limited line supply (115 Vac and 15 amp breaker)
Amp only driven to 500 watts out for testing
From results below it can be assumed that Amp will deliver
Full power out with a 220 Vac Line supply or at 115 Vac with a 20 or 25 Amp line supply.

This Amp was driven with a Triton 4 at 30 to 40 watts input to Amp
Results Below:

80m 30w input 500 watts output this is 16X input
40m 30w input 500 watts output this is 16X input
20m 30w input 500 watts output this is 16X input
15m 30w input 500 watts output this is 16X input
10m 40w input 500 watts output this is 12.5 x input
more drive for same given output.This is normal for this band.

30w input/ 500 wattsout = 16 x input

Conclusion: With proper AC Line volts / ampere supply from ac mains this
Amp should deliver full factory output on all bands.

Imformation Above Supplied by: WB0ZNY Tom Bittner."

Well thats what I have Please email me if your interested at
PS: No Mods have been done!

I am asking for $800 dollars or best offer.
Thanks Matt

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