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Old 21st February 2013, 10:58 AM   #201
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Default F6 with primrose transfos

just thought I'd show how the primrose transformers look like with the teabags's f6 boards. These are fully potted.

regards.
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Old 21st February 2013, 11:27 AM   #202
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Very nice! I am jealous of your PSU caps. DIdnt think much about PSU caps until I changed brothers RIAA stage from NIchicon Kg to Siemen Sikorels. I fearfully say I could hear the difference.
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Old 21st February 2013, 12:30 PM   #203
zman01 is offline zman01  Bangladesh
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necplusultra,

Nice indeed! What's the rating for those and any idea on how much do they weigh? Thanks for posting.

Last edited by zman01; 21st February 2013 at 12:33 PM.
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Old 21st February 2013, 02:47 PM   #204
Ryssen is online now Ryssen  Sweden
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Do the rectifier diods rellay need cooling?
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Old 21st February 2013, 03:33 PM   #205
InSides is offline InSides  Macedonia
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Quote:
Originally Posted by necplusultra View Post
just thought I'd show how the primrose transformers look like with the teabags's f6 boards. These are fully potted.
Very cool. Can you let us know what are the values for the M-Lytic's and possible source?

I don't see Mundorf listing 35V rated electrolytics on their main site.
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Old 22nd February 2013, 11:36 AM   #206
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Greetings

MLyctic caps: are rated 15 000 uF at 35V. They were sourced from parts cnxn about 2 years ago. unfortunately, they are no longer available. I always try to use them for my high-end builds. They were originally for an F5 but I ended up using 33000 uF to fit the pd psu boards. I like better Teabags psu boards. Alot better quality I find.

Rectifier,: using ixys bridges for the F5 and I am sinking them since they do get hot. Not sure for the mur's although I tried them on the F5 and they did get hot . Sinks may be an overkill.

primrose: rated at 2 x 18v @ 300 vac. they weigh 2.8 Kg according to sumR spec sheet. I get 19.4 V off-load but they should attain 18v with the amps connected. rated at 8.35 A per 18v winding.

note: there's a GB for the primrose currently brought to us by buzzford ( no pun inteneded , thankz buzzford!)

hope this answers everything.

Last edited by necplusultra; 22nd February 2013 at 11:38 AM.
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Old 22nd February 2013, 01:14 PM   #207
InSides is offline InSides  Macedonia
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Quote:
Originally Posted by necplusultra View Post
unfortunately, they are no longer available.
Yeah, thought so... the new ones are a bit larger and rated at 40V.

But why two PSU boards? And two transformers? Going fully dual mono?

Also, when you get the chance... can you please let us know the physical dimensions of the transformers? Trying to see if I can cram a fully dual mono in the chassis I have.
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Old 22nd February 2013, 02:49 PM   #208
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Actually, the group-buy is brought to you by buzzforb (not sure what the pun was, but anyway...)
Primrose(SumR Audio) Toroid GB
But I believe it is ending either this week or next.

Quote:
Originally Posted by necplusultra View Post
Greetings

primrose: rated at 2 x 18v @ 300 vac. they weigh 2.8 Kg according to sumR spec sheet. I get 19.4 V off-load but they should attain 18v with the amps connected. rated at 8.35 A per 18v winding.

note: there's a GB for the primrose currently brought to us by buzzford ( no pun inteneded , thankz buzzford!)

hope this answers everything.

Last edited by bugzbunny; 22nd February 2013 at 02:54 PM.
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Old 22nd February 2013, 02:59 PM   #209
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pun was currently brought to us by buzzford
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Old 26th February 2013, 05:12 PM   #210
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Update.
I am about to close GB. I made error in figuring cost, only pricing in one pair of Jfes. I also did not get correct number for power resistors. The price of the kit will go up $7 to $68. I will give everyone a couple of days to back out, if you want.
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