UltraSonic Studios Amps
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Sep 5, 2021 at 4:37 AM Post #3,541 of 7,569
You should get this too. I've never heard one, but I've also never heard anyone say that any Arcturus tube sucks. :smile: The 7F7 is electrically identical to a 6SL7 (despite the seller labeling it as a 6SN7), it just has a loctal base so you'll need an adapter. Probably LOTS of cheap and excellent 7F7's around as they don't ping much on audiophile radar scopes.

https://www.ebay.com/itm/234054306097?_trkparms=ispr=1&hash=item367eb94931:g:hjMAAOSw7DZgymCZ&amdata=enc:AQAGAAACkPYe5NmHp%2B2JMhMi7yxGiTJkPrKr5t53CooMSQt2orsSRAQR8FABHjfpFoyRlXhWmZNiEIY1ja2QEaMr2%2BAgCSpCOWAvMEZyEVqB%2BnfFB7QroYwD3uqZM5n%2FCPqBYGCM65yN%2FUCsNk6rfyFLnjSz0JRMA6Ky7l2YmDWnrJ77OFuay1XW5nz2AS2y5UT8n7VWVcFyZuPIpV1UiApnC3uXs1sG7g6SjultueodlH1yGuLmq9z%2F%2FRNaIxJc8%2FugvXy3Rjy4oNrVYAmH9mnECg9mZEGg8%2B5roBgl%2FdHmhb%2BqHjat%2BLJQ0JSAueOWFVixy8lTMR64Jx2eiaROLYFQjY0%2FSxiliFo7EtHe4TgAwgr5T3ozN6b85WlTxGigqWp5FyzaAld0I5qpehkGxgz5M0BBd%2FSzKdY60thdIKubMT4X7S4KQLvbldaKcnCeQ59AcuerWr%2Bk%2BWJVPreFPaBBRFkm%2F37CHGghGbjGcVBpvbvLfnvL16I68WS5pB8g%2FWW2Y%2BNtPcF5%2Br74hzBxnu3ZPC4jsZC%2BR7CwIq818d1cqyU0VtoS51Jm6r1eeZiPu1%2Faq8KRI9vne0deOnWYZ7G7u5WSs1NzyHfzln0TN0rSade9uwl8Xc3lmSscfw2pNQVrEnSSdii2%2FLjN6rF9jRm4Wvs0y9cq%2B%2FUuYOO0h9lT39ha1ZPfF02fWRl8hmEpFkrdYh7gv8GwZ7XUPUjwYq3Q9P9vTSiEK7jejR2tlnDpo2niK6s9hJ3eTLQ3%2BFKaFzejThy4D4s5cOI%2F4ftNjM8we0LS2THLk8eJPSsS4q1f2bYAx%2BZzqlX8xcxda65aMon%2Fl7y05POteFcqIPiLrKDprujlHNe8mUk24%2FF8TvqUtw5df%2B8I|ampid:pL_CLK|clp:2334524

Adapter:

https://www.ebay.com/itm/284357984013?hash=item42350e7f0d:g:vHIAAOSwQrJbUX-q
Yeah, I have come across the 7F7's, they are excellent, have the short pins for less interference, and more importantly are dirt cheap. 😉
 
Sep 5, 2021 at 4:40 AM Post #3,542 of 7,569
Sep 5, 2021 at 4:56 AM Post #3,544 of 7,569
Sep 5, 2021 at 5:12 AM Post #3,547 of 7,569
Something else that I want to get in the not too long future is this mother of all rectifier with Woo adapter. That will be a perfect match with Odyssey.

DSC01390.jpg
 
Sep 5, 2021 at 5:18 AM Post #3,548 of 7,569
I say it on the first week and I say it again now. Odyssey makes ordinary tubes sound great. Which means something else is doing the heavy lifting of great SQ here.
Sonic probably wouldn't comment himself but I think the key to this probably is getting each tube type operating at it's idea bias point. Most amps set a figure which suits all tube types on average but doesn't optimise for a particular type.
 
Sep 5, 2021 at 5:49 AM Post #3,549 of 7,569
Sonic probably wouldn't comment himself but I think the key to this probably is getting each tube type operating at it's idea bias point. Most amps set a figure which suits all tube types on average but doesn't optimise for a particular type.

Absolutely but he also optimise the use of good boutique parts. I know he starts of with doing the schematics in the design stage... after I tell him what I want.

I am quite stingy with my praise but Tomas has no idea what he has created here. :wink: Which is why I think if he does a 300b amp with what he has done for Odyssey, that amp will be amazing.
 
Sep 5, 2021 at 6:46 AM Post #3,550 of 7,569
I am quite stingy with my praise but Tomas has no idea what he has created here. :wink: Which is why I think if he does a 300b amp with what he has done for Odyssey, that amp will be amazing.
Thanks, Matt!
Yes! The 300B version is underway. It will be called Telemachus! The son of Odyssey! The design is done and I'll build it in the end of this year! :)
 
Sep 5, 2021 at 7:03 AM Post #3,551 of 7,569
Thanks, Matt!
Yes! The 300B version is underway. It will be called Telemachus! The son of Odyssey! The design is done and I'll build it in the end of this year! :)

What the... I wasn't even aware that Odyssey has a son. :ksc75smile: Same chassis as Odyssey? Would look a great pair side by side !

Pair of drivers in front. Back row centre is the rectifier, flank by the 300b tubes. Transformers behind. Perfect.
 
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Sep 5, 2021 at 7:24 AM Post #3,552 of 7,569
What the... I wasn't even aware that Odyssey has a son. :ksc75smile: Same chassis as Odyssey? Would look a great pair side by side !
It will have a silver chassis but bigger than the Odyssey one. It needs to be bigger to accommodate for the 300B filament supplies.

Pair of drivers in front. Back row centre is the rectifier, flank by the 300b tubes. Transformers behind. Perfect.
That's the layout, yes. :)
 
Sep 5, 2021 at 7:30 AM Post #3,553 of 7,569
Thanks, Matt!
Yes! The 300B version is underway. It will be called Telemachus! The son of Odyssey! The design is done and I'll build it in the end of this year! :)
Oh my. You have my full attention! Like forever from now. :smile:

I want mine called EGAD -- End Game Amp, Damnit! :sweat_smile:
 
Sep 5, 2021 at 7:33 AM Post #3,554 of 7,569
It will have a silver chassis but bigger than the Odyssey one. It needs to be bigger to accommodate for the 300B filament supplies.


That's the layout, yes. :)

My eyes are glassy now. Listening to 'You and your friend' Dire Straits. Brimar 6sl7 and Gec Kt66 captures the soul and essence of the song. Odyssey sound way too good now.

My eyes are glassy not from what I'm hearing but what you have just said above.

Now Bcowen wants Telemarcus except he wants to call it Egad.... I will call it Enigma. You have my full attention too !
 
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