| Author |
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radiodude
| | Posted on Saturday, September 21, 2002 - 5:28 pm: | 
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A friend just dropped off a amp to me . It is a base amp and man is it heavy!!! It has two big nobs marked PLATE and TUNE and a row of toggle switchs on/off pre amp high/low
Amp is tan and has the numbers 321 on it. Inside it has 4 6lf6 tubes , three are clustered and one seperated. Does anyone have any info on this ???? |
2600
| | Posted on Sunday, September 22, 2002 - 1:40 am: |
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It's a PAL 321, sold by the guy who marketed the PAL sliders, and who originated the "Fire-Stik" antenna line. Folks said at the time they were made in Palomar's factory in Escondido, but I really don't know. Some versions were made with 8950 tubes, others with 6LF6 like yours. One tube drives the other three. It would make a really dinky radio really large. Since it has only one driver tube, a modern base like a Saturn, or 2-transistor final radio may hit it too hard on swing. There is a small knob in the back that serves as the Tune control for the driver. Don't use it as a carrier control. Turning it away from the peak will overheat the driver tube.
If the filter capacitors and relays are still good, this is a sweet little amp that should do 500 watt peaks comfortably, and do it for a while, if you can resist driving it too hard.
73 |
radiodude
| | Posted on Sunday, September 22, 2002 - 10:49 pm: |
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Well it maks my Tomahawk go big!!!! Does around 400 when I drive it with 3 from my Melaka!! I really like it! It has one problem tho, when i flip the preamp on the receive goes dead!! Have any ideas on that?? |
Bigbob
| | Posted on Tuesday, September 24, 2002 - 5:41 pm: |
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Hey radiodude what happened to write up of 4-final dx2517,hmmmmm?Just curious.Bigbob. |
radiodude
| | Posted on Tuesday, September 24, 2002 - 11:09 pm: |
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It was a joke dude !!! on me |
2600
| | Posted on Wednesday, September 25, 2002 - 4:29 pm: |
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The preamp problem usually boils down to two parts: the preamp relay, and the preamp transistor. The drawing shows a 2N2222 transistor for the preamp. I don't have any pictures here showing where it's located. Look to see which relay goes 'click' when you turn on the preamp. USING A LONG INSULATED STICK, LIKE A WOODEN DOWEL,
try tapping on the body of the relay. If the receiver comes back, even briefly, the relay is probably bad. The 2N2222 transistor is probably right next to the preamp relay. If it is bad, it can be replaced with a generic plastic-body PN2222A, like RatShack sells. It is easily popped, by using the preamp while talking SSB (yeah, really) or by someone in the driveway keying a really large mobile while the preamp was turned on.
Odds are that your noise level never drops low enough to really use a preamp. If you have any flicker on the receiver meter at all from the noise level, the preamp will usually just make the noise louder. Only if the noise level drops to zero will you get any use out of the preamp. You can never hear anybody who is weaker than the noise, no matter how big a preamp you use.
73 |
radiodude
| | Posted on Wednesday, September 25, 2002 - 10:53 pm: |
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Yup dont need it just wanted to know how to "fix" it.Thanks |
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