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Old 23rd December 2002, 05:48 PM   #31
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Default Tube manuals

Here are a few more online sites for tube data (and let me know if I missed any, OK?)

http://www.audiophool.cjb.net/Techno.htm
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Old 23rd December 2002, 05:58 PM   #32
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PSE means Parallel Single Ended. By paralleling the output valves in an SET amp, it's possible to double or tripple the output power, though all do not approve.
Probably the "Push Pull" topology would be better for a starter amplifier. Easier, and much cheaper to get that power output.
Also, have a good think how much power you actually need.
Check on previous threads abou speaker efficiency vs power.
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Old 23rd December 2002, 06:15 PM   #33
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Hi,

I stand with D'haen here.

60W in single ended is going to require a lot of paralled tubes.

I'm not even sure there is such a beast out there.

Much easier to do with a simple PP of a pair of output tubes and improve the circuit by paying attention to the power supply (PSU)
and other "details".

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Old 23rd December 2002, 06:34 PM   #34
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Default 60W DIY

Tom: thank you!

Dhaen, fdegrove: So, it seems that the route to go is the push-pull way, for both simplicity and cost. I was under the impression that P-P led to poorer performance, (as it does in some solid-state amps) but I wonder if I should even worry about that for the time being?

fdegrove: You say that improving the 'details'such as the power supply, would sweeten the experience of the P-P tube amp. What else do you recommend?
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Old 23rd December 2002, 06:40 PM   #35
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Default FIRST AMP

Hi,

Quote:
What else do you recommend?
Generally,paying attention to layout,passive components choice such as coupling caps,resistors,hook-up wire even the solder you use.

Once you've made your choice of amplifier circuit you'll see the advice flowing in from all sides,believe me.

Cheers,
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Old 23rd December 2002, 06:47 PM   #36
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Default 60W DIY

OK! layout of the circuit pieces? and wiring? what would the board recommend?

What are the best brands to use for the caps, and resistors? I am eager to discuss the items on parts list, or what the list is, for that matter?

Regards
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Old 23rd December 2002, 06:52 PM   #37
dhaen is offline dhaen  Europe
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Quote:
I was under the impression that P-P led to poorer performance
Well, it's a bone of contention
Although I am an SET man myself, I'd be the first to admit that a mediocre SET sounds worse than a PP to anybody.

What I was trying to get over (please excuse my limited descriptive powers - after all, this is my native language ), is that for high powers >15W, SET becomes cumbersome, and if not done perfectly, at great expense - mediocre.
Whereas PP (even though the component count may be greater) can achieve super results.

If, on the other hand you want something that sounds soft and warm: sell your speakers, buy some high efficiency ones, and build a 300B amp, and wallow in it - be happy
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Old 23rd December 2002, 07:03 PM   #38
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Default HANG ON....

Hi,

Tony,

Quote:
OK! layout of the circuit pieces? and wiring? what would the board recommend?
Hold your horses...

First things first:

1/PP amp 50-60W?Which one,Genalex or more like the Quicksilver?
Or something else perhaps?
There are at least a dozen schematics available on the net for that topology alone.

2/Sources for unusual compontents such as the OPT,choke(s) powerxformer,chassis,tubes etc.

3/After that we can discuss the finer details.

Back to you Tony,
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Old 23rd December 2002, 09:17 PM   #39
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Default DIY 60W

I would defer to the best suggestions of the group as to which topology/design to go with: quicksilver or Genalex..

As for sourcing parts, any direction would be appreciated...

Regards
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Old 23rd December 2002, 09:26 PM   #40
dhaen is offline dhaen  Europe
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Over to you Frank
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