| Mu follower, headphone amp? - Click HERE for Original Thread |
| alk |
Hi,
Would someone care to tell me if this preamp is suitable also for headphones?
http://haute.fidelite.com.online.fr/c-DIY.html
The main reason for choosing this schematic is that i have already the valves and transformer. Don't need to be perfect, i don't have the perfect headphones either. Just wanted to know if it would sound ok with headphones, mine are 26 Ohms.
Thanks,
Alk |
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| fdegrove |
Ola,
| quote: | | Would someone care to tell me if this preamp is suitable also for headphones? |
No.
Certainly not with 26 Ohm impedance cans.
You could still use the ECL86s though to make a small amp with the Penthode part of the ECL86 (that's a EL84) in triode mode configured as a Cathode Follower cap coupled into the cans but 26 Ohm would still be a mismatch.
Here's what I would do if I had 4 ECL86s and wanted to build a headphone amp with them:
Triodes (ECC83) in SRPP to drive a White cathode follower consisting of a pair of penthodes in enhanced triode mode (EL84) per channel.
That should work if I'm not mistaken.
Ciao, ;) |
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| alk |
Hi,
Good to know. Project discarted.
| quote: | | Triodes (ECC83) in SRPP to drive a White cathode follower consisting of a pair of penthodes in enhanced triode mode (EL84) per channel. |
About the white cathode follower i was just reading in Tube Cad and i thought, too much trouble to drive my headphones ---best to buy better. I am yet too noobie to implement this idea so.... i'll wait or read more. Thanks for stopping me in what would have been a waste of time. I believe that with a 2V input i don't need a pre, so this would have been for headphones use only.
Cheers.
Saving up for the Lilliput;) A pity 6080's don't look as good as 300b's though. |
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| fdegrove |
Hi,
| quote: | | Saving up for the Lilliput A pity 6080's don't look as good as 300b's though. |
The 6AS7G is an equivalent of the 6080 and uses a shoulder shape glass:
Cheers,;) |
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| alk |
Hi,
That JAN 6080 looks cool....the one in the kit is a GE 6080, which one is better?
The Svelatna looks great also...umm... i have two choices....i'll have both.:D
Happy to know,
Cheers. |
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| fdegrove |
Hi,
| quote: | | That JAN 6080 looks cool....the one in the kit is a GE 6080, which one is better? |
The JAN should be the more rugged of the two. Whether there would be an audible difference with such a low mu tube I don't know.
The USSR ones may sound different though.
BTW, why don't you use the Lilliput to drive the headphones?
Just use a volumecontrol on the input of the amp and you're done.
QED, the British company reknowned for their range of accessories may still make a switchbox allowing you to hook-up two headphonesets and a set of loudspeakers allowing instantaneous switching between phones and speaker output.
Cheers, ;) |
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| runeight |
It is my opinion that a WCF makes for a much better OTL tube headphone output stage. It is effectively push-pull, doubling the output current for a given idle current (compared to a follower), gives a very low Zo, and uses a minimum of parts to get more power output than any other type of stage (for a headphone amp).
Check out Headwize for some articles and threads on this type of amp. |
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