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tuner before amp
- Thread starter 552fl
- Start date
Similar mentality as running a supercharger and methanol fuel with nitrous in a small displacement rice-burner engine. It will be hard to touch on the street.......for a while........and then the engine explodes and it's game over. Now imaging that engine are the tubes in that amp.
A buddy of mine ran an Ameritron AL80 at 1Kw all the time. Eventually the paint blistered on the chassis and the tube failed in a spectacular display of light and a loud bang. I told him it went supernova.
It ended up in the landfill as it was burnt beyond cost effective repairs. Maybe. That depends on how you AM. For 900 pep would be somewhere around 225 watts carrier unless you get yourself a super swing kit from the local cb shop. I wouldn't feel comfortable making an old buzzard transmission with an sb220 at that power level. It would probably be fine if you didn't have much to say.
A few guys around here have smoked the plate transformer in theirs so I don't have a lot of confidence in the sb220 on AM. The ones that keep them alive at high power AM make the S-meter swing like tiger woods.
Shadetree Mechanic
Delaware Base Station 808
So a 600w dead key is out of the question?
For how long and how frequently? I know a guy that gets 500 out of a 4x8 sweep tube amp. He sounds like crap and can't talk very long though.
BJ radionut
Supporting Member and 6m addict
Yes possible...If built around this type of Peter Dahl Transformer...otherwise in AM service 600-700 PEP Output is where I would use it...
Your talking about 3 db difference which is barely noticeable to human ear...
700 watts PEP vs. 1400 watts PEP
The difference between 600 watt PEP and 1000 watt PEP output....
The receiving station will NEVER know the difference!
HEATH SB-220-X2
OUTBOARD - POWER TRANSFORMER
CORE) A-518 C-CORE STYLE #) 10 HIPERSIL C-CORE
PR) 117/234 VAC 60 HZ WITH HI-LO TAPS
S1) 925/1175 VAC @ 3.5A CCS
DM) HT = 10.000 WT = 8.825 DT = 8.313 MD = 4.500 MW = 6.250
PRICE) $1,012.00 Plus S&H FOB Buffalo, NY WEIGHT) 66 LBS
All the Best
Gary
Before spending that kind of money upgrading the plate transformer I'd sell it and buy something better. The sb220 seems to sell well.
If I were to upgrade and outboard the plate transformer I'd go with one from ameritron. I believe the transformer for the al82, 1200 and 1500 is under $500. Then you could ditch the voltage doubler. You would still be lacking a proper cooling system.
If I were to upgrade and outboard the plate transformer I'd go with one from ameritron. I believe the transformer for the al82, 1200 and 1500 is under $500. Then you could ditch the voltage doubler. You would still be lacking a proper cooling system.
just ordered the machlett 3 - 500 zg tubes. From Penta Laboratories in California.. my plate amps are very low when key with foot pedal.. .1 amps and modulating power through only swinging up to two-and-a-half to three not pass that at all.. my technician said the tubes are squished or soft need to be replaced
Can't can't wait to receive my new tubes this ought to freshen up the oldgirl good.. and give some good output then
You should be able to make these there is nothing special about them I have constructed the hairpins which arguably are better than the inductor types.
Sorry I sketched this at my business computer and scanned it in as this is what I have always used not just on 220's but other amps as well.
If you can solder you can make the suppressors. Find something round and wrap the wire around it to make a smooth bend. If you don't feep confident that's ok but it's an easy project.