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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 7th October 2019, 03:15 PM   #11
Duke58 is offline Duke58  United States
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Join Date: Jan 2009
Quote:
Originally Posted by itsikhefez View Post
Hi all,

I recently built a Tubelab SE with 45's with ElectraPrint OPT's and sound is amazing.
I'm thinking about another TSE with 300B's and would like to try a different brand of OPT's (The EP's are wonderful, I simply want to try something else)

I'm specifically interested in ISO, Hashimoto or O'netics.
Looking for folks experience in any of the listed models below:

In the preferred budget, there is:
ISO FC-20S
Hashimoto HC-203U
O'netics Level 1

In the higher range there is:
ISO FC-30-3.5S-II
Hashimoto H-20-3.5U
O'netics Level 2.

Both offer similar chokes (10H @ 200mA, ~150R) in the ISO LC-10-200D-II and Hashimoto CC-10-200W.

Honestly this system is only going to be used occasionally so anything from the higher budget is pretty much overkill. Just listed them here in case anyone had direct experience with them.
Can you please tell me where you bought the ElectraPrint OPTs used for your 45 amp? Where to buy and part number?

Thanks!
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Old 7th October 2019, 03:16 PM   #12
itsikhefez is offline itsikhefez  United States
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300B SE OPT & Choke choice
I bought them direct from Electra-Print.
Fill out the form at Ordering Products and Contacting Electra-Print and Jack will contact you pretty quickly. It helps to be specific about what you want.

For a 45 headphone amp I bought 5K:32, 50mA, 3W, although there are other options.. depends on your needs
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Old 7th October 2019, 05:15 PM   #13
Duke58 is offline Duke58  United States
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Thank you!
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Old 13th October 2019, 08:07 AM   #14
itsikhefez is offline itsikhefez  United States
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300B SE OPT & Choke choice
I ended up ordering ISO FC-20S OPT and LL-10-200D choke. Should arrive here next week
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Old 18th October 2019, 04:04 AM   #15
itsikhefez is offline itsikhefez  United States
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300B SE OPT & Choke choice
Cargo is here.. feels solid.
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File Type: jpg 2019-10-16 19.03.57.jpg (462.1 KB, 152 views)
File Type: jpg 2019-10-16 19.04.53.jpg (365.7 KB, 152 views)
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Old 18th October 2019, 04:23 AM   #16
vinylkid58 is offline vinylkid58  Canada
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300B SE OPT & Choke choice
Quote:
Originally Posted by itsikhefez View Post
Cargo is here.. feels solid.
Nice!

jeff
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Old 18th October 2019, 04:57 AM   #17
zman01 is offline zman01  Bangladesh
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300B SE OPT & Choke choice
itsikhefez,

Nice iron!

Where did you get them from?
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Old 18th October 2019, 05:08 AM   #18
itsikhefez is offline itsikhefez  United States
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Join Date: Aug 2015
300B SE OPT & Choke choice
Ordered direct from ISO- ISO TRANSFORMERS – 管球アンプ用トランス    Audio Transformers for Tube Amplifiers

Mr. Osawa is very helpful over e-mail. Once order is placed, cargo from Japan to USA took about 1.5 weeks.
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Old 18th October 2019, 05:14 AM   #19
zman01 is offline zman01  Bangladesh
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300B SE OPT & Choke choice
Thanks.
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Old 22nd November 2019, 02:37 AM   #20
itsikhefez is offline itsikhefez  United States
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300B SE OPT & Choke choice
For 300B, I would like to connect 5K:8 and need some assistance on wiring the ISO..

For primary I need 8 & 10, for secondary 5 & 6, although I'm unsure of the polarity of the wiring

Link to manufacturer page
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