Heathkit SB-220 Linear Amplifier clean and working, I need to stay away from swaps.

[@keithweiss7899]

Back in the 70’s a friend known as “Blues” used to build these to sell to the channel 6 guys. But they kept them keyed down for extended time and kept burning up the transformer. So he put two in them. No more problems. Then he built some with 3 tubes and two transformers. Then 4 tubes and 3 transformers. His last creation had 6 tubes with 4 transformers. I often wonder where those things ended up.

[@tramdr]

We had a lot of 500z builds like that back then. Called them Crab boxes same reason they called the hard wired D20I a Rat's Nest.

[@Mauldropper508.]

Clicked edit for typos won’t let me 🤔 Added above 4.8-5.2v of bias good to go

[@MikeParrotta]

Great workmanship

[@tramdr]

Thanks

[@spaceflight1019]

If you want to upgrade the power transformer Peter Dahl has a replacement.

[@tramdr]

They not cheap though.

[@spaceflight1019]

@@tramdr True, but I never have heard anyone gripe about the price of a Peter Dahl transformer.

[@darrelldundee7198]

@@spaceflight1019 takes a while to build and mailed to you fed-ex

[@rocklickranch2804]

I finally found a minty L4B but I’d like to have a Henry for a backup, or maybe use the Drake for a backup. Lol

[@tramdr]

I got a thing for both the Drake L4B and Henry boxes. They are very well built. Not that Heathkits are bad, but they are not tanks. I like Tanks.

[@michealbell5042]

I have a sb 200 pack it up for ten years. Just pulled it out the other day and realised I have no out put . It will switch on ok, I cleaned the relay on put used 40 watts and got nothing out , keeping in mind I used this amp before without a problem 🤔 Do you have any suggestions.

[@tramdr]

It has a multimeter which if used right would tell you a lot. If the HV good? 2nd when you key it with no drive, does the amp meter move up some? Whats the input SWR with the amp keyed and on? Does the amp meter and grid meter read up when its keyed and driven?

[@michealbell5042]

@@tramdr Thank you for replying I will double check on the weekend. But from memory the HV was 2400. I been a big fan and enjoy watching your channel on a weekly basis.

[@kevinstevenson5591]

How much will amplify without the tubes.w8dmx

[@kevinstevenson5591]

I'll look at how much you want for amplifier with out tubes

[@tramdr]

600

[@kevinstevenson5591]

@@tramdr I'll get right back with you what state you are you

[@tramdr]

I'm in Michigan

[@wayneholland1832]

Greetings, I'd like to know if you have a modulator for sell?

[@tramdr]

I have a few small ones.

[@wayneholland1832]

@@tramdr I would like a Maco 75 or a JB12 that works .

[@wayneholland1832]

let me know how much.

[@wayneholland1832]

I would like a Maco 75 when you have one to sell, I won't waste your time and will pay promptly.

[@tramdr]

400 for this one: kzbin.info/www/bejne/jISqkmyvr66FbNk

[@iggystim]

Excellent

[@tramdr]

Thank you! Cheers!

[@thesquirrelchroniclesakare7808]

So how much for it with no tubes ?

[@tramdr]

600

[@thesquirrelchroniclesakare7808]

​@@tramdr ok

[@rocklickranch2804]

@@tramdrPlus the ride.

[@Fj-fe6co]

For sale? No tubes.

[@tramdr]

750 plus the ride, firm, with no tubes. 1000 firm with tubes.

[@nordland2235]

110 or 220 ?

[@tramdr]

These can go either way with moving a couple connections on the terminal block. However, it's on 110 right now and in the vid, but it is a direct 110 line. Plugging this into a normal house 110 line would be pushing the limits of the line. I might could get a little more if I put it on my 220 line but it came on 110 so I just left it.

[@djlunchmeat7710]

A Tate moment!!! hihi 033 ride gone!

[@tramdr]

Yes Sir.

[@FireballLive1]

I need this ill trade you my phantom 500

[@tramdr]

Naw, actually I would trade you 2 Phantom 500's for one of these.

[@FireballLive1]

@@tramdr darn I just got the one. I haven't put the hv capps in yet but I have them

[@Joe-KN4IFI]

😯😮🤓

[@tramdr]

Smile

[@macsierra7777]

😮

[@tramdr]

Is that a sad sign?

[@JustinPartridge-v3f]

I used to have one of those and I got for free I wish I still had it he's in my room

[@jasonhurdle2000]

❤

[@tramdr]

Thanks.