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For the life of me, I can't figure out why you would need one for each line lead? If the voltage drops, the current rises making the same output power from the transformer. The same amount of power

Jim, I've seen these used, but they were used in smaller DC supplies. I have several books on the subject and will look it up. That value though seems way to much at 35 uF for this. Placed across the

Hirams Percys father, Hiram Stevens Maxim was the daddy of the Maxim machine gun that helped cause all the carnage in WWI. Though the Browning machine gun eventually won out during US government

Amplifiers that run on two voltages need two step-start resistors, but those that run on one V need only one R L Measures, AG6K, 805.386.3734 r@..., rlm@..., www.somis.org

Garry, That is a great question. I have a couple projects going together RIGHT NOW that had me thinking the same thing. It depends on if you cheat or not. OK what does that mean? 220V wiring is 2 wire

When running an amp on 240 volts, is it necessary to put a resistor in both sides of the 240 volt line for inrush current protection or would a single resistor of adequate size in one leg do the job?

All of Jim's points are valid and a good amp designer will take them into account. I would just caution anyone on adding an arbitrary XX% of airflow "just in case". If you are serious about your amp

Gents My buddy tried this... said it worked. He gave me a 32 uf cap to try it myself. It gets installed directly in parallel with the pri of the plate xfmr. [this is for a C input HV supply]. I didn't

wrote: #### Well.. Eimac specs ceramic metal tubes for a seal temp of 250 deg C [482 deg F] On a triode... this is where the lower portion of the anode just touches the ceramic "stem". The top part of

Not according to history, Jim.

... provided that if the tube blows out of the socket, the operator can catch it on the fly. R L Measures, AG6K, 805.386.3734 r@..., rlm@..., www.somis.org

--- In ham_amplifiers@..., RICH SEZ... opposite page (p.9) there's a picture of the inventor of the firearms silencer, Hiram P. Maxim, wearing a set of headphones - but strangely he is

past. however the ### Drake uses the same Johnson sub mounted sockets on the L4B. [came out in 1969].. on aluminium cylinder standoffs. The 3-500Z spec is for only .08" h2o... which is easy to

The only absolutely guaranteed measure of correct airflow is to measure the temperature of the tube seals as specified by the tube manufacturer, under full load for long enough for the tube to reach

I have never seen an amplifier with a cooling system like a SB-220's.

Rich wrote: <snip> I agree with that... most countries do not have the spectrum grab that goes on here in this country either. That's one factor for having a voice in the process. From having sat in

If the mfg's marking ink on the glass turns brown, more air is probably a good idea. If the tube blows out of the socket, a smaller blower is in order. cheers, G. R L Measures, AG6K, 805.386.3734

Correct. That a stack of Ben Franklins 44,000 inches high.