| Nickel Wonder Line Stage [message #8564] |
Wed, 17 November 2004 04:49  |
FredT
Messages: 704
Registered: May 2009
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Illuminati (1st Degree) |
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Here's a cool design that Lee Roitberg of Simplicity Audio brought to the recent Lone Star Bottlehead meeting. My copy is beginning to take shape as parts arrive. Nickel core output transformers - no caps in the signal path! See the link to pictures of Lee's prototype and the schematic in the caption above my picture. You can build this one for a bit over $100 - less if you use inexpensive or reclaimed parts.
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| Re: Nickel Wonder Line Stage [message #8565 is a reply to message #8564] |
Wed, 17 November 2004 07:37  |
GarMan
Messages: 960
Registered: May 2009
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Illuminati (2nd Degree) |
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Simple and inexpensive. I like that. I can easily be done for under $100. Even if you use the more expensive Hammond power transformer. Fred, can you give a listening impression. The 124B is rated for only 150Hz to 15KHz, same as Hammond's 125 series SE output trans. However, a lot of people who have used the 125SE's believe it operates very well outside of specs. JE Labs confirmed that it's actually +/- 1dB between 20Hz to 20KHz. Wonder if its the same for the 124 P/P series? Gar.
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| Re: Nickel Wonder Line Stage [message #8566 is a reply to message #8564] |
Wed, 17 November 2004 23:28 |
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Wayne Parham
Messages: 18787
Registered: January 2001
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Illuminati (33rd Degree) |
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Hi Fred, That's pretty cool! Thanks for mentioning it. I'll have to remember to check it out when I get more time. I love the looks of that Ella. The photo of it with glowing tubes is cool. The Nixon DAC and the Foreplay look nice too. I like the layout of the modified Foreplay. Cool stuff! Wayne
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| Re: Nickel Wonder Line Stage [message #8591 is a reply to message #8564] |
Thu, 02 December 2004 12:01 |
thetubeguy1954
Messages: 29
Registered: May 2009
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Chancellor |
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Hi Fred. I read your post, clicked on Nickel Wonder link and looked around. I eventually (after many pages came to the FredArray! \Is it yours? It suuuurrrrreeeee looks nice. Would love to hear an efficient array system with my amp. Unfortunately for me, I just don't have the knack for working with wood. Well I really posted because I wanted to say how nice those speakers looked and congrats is they're yours! Tom Scata
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Music never makes you sick but, noise always annoys.
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| Re: Nickel Wonder Line Stage [message #8641 is a reply to message #8565] |
Wed, 22 December 2004 06:33 |
TubeCraft
Messages: 30
Registered: May 2009
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Baron |
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Hi y'all, my first post here. I'm using the 124B (driven parafeed by parallel sections of a 6n1p) as an IT in a single ended 6B4G amp. It sounds great. Neat trick in the nickel wonder, spinning it around "backwards" like that for a 3:1 step-down... I think it'd definitely better than specs say in that application because it's rated as a driver xfrmr - at 5 audio watts. Unless you're driving a class B or A2 stage ahead of it, it's not working nearly as hard as that. TC
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