Azazello,
A triode wired 6V6 family tube will hold its own against a 2A3. The #45 is better than a trioded 6V6, but look at the difference in price. High efficiency speakers are, of course, essential with "flea" power SE amps. About 2 W. is the power yield, when "12" W. multi-grid types are run trioded in Class "A".
BTW, the Russian 6П15П-EB (6p15p-ev) also makes a fine sounding triode.
A triode wired 6V6 family tube will hold its own against a 2A3. The #45 is better than a trioded 6V6, but look at the difference in price. High efficiency speakers are, of course, essential with "flea" power SE amps. About 2 W. is the power yield, when "12" W. multi-grid types are run trioded in Class "A".
BTW, the Russian 6П15П-EB (6p15p-ev) also makes a fine sounding triode.
The 6П3С (6p3s) is NOT a member of the 6V6 family. It is a member of the 6L6 family. Both groups are beam power tetrodes, but the more powerful 6L6 is considerably less refined than the quite elegant 6V6.
There are any number of types that belong to the 6V6 family, which are reasonably priced. In 9 pin miniature tubes, look at the 6CM6 and 12AB5. In Loctal based tubes, look at the 7C5 and 14C5. Naturally, the 12V6 makes the list too.
Don't be the least bit afraid of the 6П15П-EB (6p15p-ev), if you can source them for reasonable money. It's a fine tube and you would, more or less, follow the DECWARE SE84 setup.
update
Decided on the 6P3S at the end.
chassis will be this one: ?así pro zesilova? - ?erné | patice.eu
PS and OT covers: ?así pro transformátor - ?erná barva GDTC04 | patice.eu
of course depending on the transformer sizes.
Transformers from INDEL.
At the back safety switch with integrated fuse, power cord connector, RCA input and speaker out. At the front only volume knob and LED to indicate power ON. The only problem is I would like WBT connectors allround, but the price is a killer :S
Danny
Decided on the 6P3S at the end.
chassis will be this one: ?así pro zesilova? - ?erné | patice.eu
PS and OT covers: ?así pro transformátor - ?erná barva GDTC04 | patice.eu
of course depending on the transformer sizes.
Transformers from INDEL.
At the back safety switch with integrated fuse, power cord connector, RCA input and speaker out. At the front only volume knob and LED to indicate power ON. The only problem is I would like WBT connectors allround, but the price is a killer :S
Danny
Hello guys:
its been a long time since the start of this project. but we got ahead with the amps. Chassis ordered and on its way, what I need help with is with the nF capacitors. He told me they should be of good quality becuase sound will depend on them.
Where can I get a good (not Mundorf) quality caps in the nF range?
Can someone have a look at this site - https://www.tube-town.net/ttstore/index.php/cat/c31_Capacitors.html
and help?
I am ordering stuff from there, so I could include it in one order and shiping
Thank you very much...
Danny
its been a long time since the start of this project. but we got ahead with the amps. Chassis ordered and on its way, what I need help with is with the nF capacitors. He told me they should be of good quality becuase sound will depend on them.
Where can I get a good (not Mundorf) quality caps in the nF range?
Can someone have a look at this site - https://www.tube-town.net/ttstore/index.php/cat/c31_Capacitors.html
and help?
I am ordering stuff from there, so I could include it in one order and shiping
Thank you very much...
Danny
Hi Danny,
the tube-town-store is excellent. I deal with them since many years and never had any trouble with them.
For your question about the best caps: Ask 3 mans about caps and you will get about 4-5 diff. answers.
For me i will take Wima MKP or F+T ( i believe they make the mundorfs ).
But since the prices are moderate buy some and try it .
Greetings,
Hilmar
the tube-town-store is excellent. I deal with them since many years and never had any trouble with them.
For your question about the best caps: Ask 3 mans about caps and you will get about 4-5 diff. answers.
For me i will take Wima MKP or F+T ( i believe they make the mundorfs ).
But since the prices are moderate buy some and try it .
Greetings,
Hilmar
I just installed these in my SE amplifier, some people say are really good, so I bought them, and they sound a lot better than the mullard mustards they replaced.
https://www.tube-town.net/ttstore/index.php/cat/c556_Voltage-Rating-400-V.html
https://www.tube-town.net/ttstore/index.php/cat/c556_Voltage-Rating-400-V.html
A very ill informed opinion.
I have a range of very good Class A PP amps and they all compare very favourably with my current SE spud amp.
You have either listen to classic Williamson type PP amps with large gain large feedback or you simply haven't encountered many well executed PP amps.
Shoog
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oh sorry all,
forgot to tell you that the amps are build (tested and ready to go to enclosures) with EL34 (NOS Czechoslovakian production from Tesla) and ECC82 in single ended circuit.
All I need is some advice what make of capacitors to use from that site....good quality and sonic properties
(don't need state of the art...just comparable in value and sonic performance to those tubes...
again thanks for any suggestions
Danny
forgot to tell you that the amps are build (tested and ready to go to enclosures) with EL34 (NOS Czechoslovakian production from Tesla) and ECC82 in single ended circuit.
All I need is some advice what make of capacitors to use from that site....good quality and sonic properties
(don't need state of the art...just comparable in value and sonic performance to those tubes...again thanks for any suggestions
Danny
thansk guys... but can anyone help me to select from that webpage? and Capacitors, not rezistors, I already have those (I am from former czechoslovakia
I need 630-680nF/400-600V, 470nF/400-600V and 220nF/400-600V
Danny
I have used Roederstein (acquired by Vishay) MKT caps in signal path with satisfying results. As well as WIMA MKC (polycarbonate).
How about a transcoductance amplifier?
So, you are going to use a full-range loudspeaker and SEP (single-ended pentode) amplifier. You have a good opportunity to make it a pentode based transconductance amplifier.
If you choose to have a high output impedance for the amplifier (thus approaching the idea of a transconductance amplifier), then you should have also high acoustic damping (a well damped speaker enclosure) and perhaps some pre-amplifier equalizer.
A pentode amplifier is a natural candidate to be used as a transconductance amplifier. But, that also means it would not be ultra-linear because that kind of feedback is suitable for voltage amplifiers.
Current driving has been discussed in many other threads, so I touched that subject only briefly in this post. For example here is more about current-driving: http://www.diyaudio.com/forums/vendors-bazaar/157787-secret-tube-amplifiers-revealed-much-more.html
So, you are going to use a full-range loudspeaker and SEP (single-ended pentode) amplifier. You have a good opportunity to make it a pentode based transconductance amplifier.
If you choose to have a high output impedance for the amplifier (thus approaching the idea of a transconductance amplifier), then you should have also high acoustic damping (a well damped speaker enclosure) and perhaps some pre-amplifier equalizer.
A pentode amplifier is a natural candidate to be used as a transconductance amplifier. But, that also means it would not be ultra-linear because that kind of feedback is suitable for voltage amplifiers.
Current driving has been discussed in many other threads, so I touched that subject only briefly in this post. For example here is more about current-driving: http://www.diyaudio.com/forums/vendors-bazaar/157787-secret-tube-amplifiers-revealed-much-more.html
/Sorry for OFF/ I'm not agree....I have, IMO, very high criteria for High quality sounding, using in my skill fullranges Fostex, Audio Nirvana, Tannoy with good sensitivity. I repaired good tubes ampl. Scot, Harman Cardon...and I can tell /O.K.- for me/ that PP is for driving with big power thousands heavy towers that hundred brands produce for selling, but PP is out in my criteria for "big", amazing, excellent, deep, warm.....sound. If You use Your spud SE for comparing with PP, ....the choice is Yours, acc. Your criteria...../Again sorry for off/.
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The point here is - do not attempt to mislead others with your highly subjective opinion. I can guarantee that I could put up a class A PP amp which would better most DIY SE offerings any day of the week. It seems to me that you really haven't heard any PP amps built to similar standards as a good SE amp and the examples you list are evidence of this. Can I suggest that you temper your opinion until you have heard a Vacuum State PP1 and then I might start to value what you have to say.
SE is a choice, but certainly not the only choice.
Shoog
or 'reconsider' you might still have thing or two to learn about pushpull amp
but you may be right that SE will be easier and maybe per design give a softer tone
and maybe esecially with wideband driver
but also be aware that even high sensivity speaker may need still need more than a simple flea power
like multiways with big woofers
would make little sense to have the worlds best 1watt amp if its unfit to drive your speakers
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