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August 12, 2020, 04:24:51 PM

Author Topic: nickel and pinstripe question  (Read 3541 times)

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Offline najo49

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nickel and pinstripe question
« on: January 24, 2014, 06:31:13 AM »
What is the difference between the nickel and the pin stripe? thanks Jann Olsen
Jann Olsen, [email protected]  Lowther medallion 2 with pm2a./ extended foreplay lll,/EROS phono /Grado ref/ SOTA star Vacuum SME V, /  45 amp direct coupled,c4s,mQ nickel  / paramour  2a3 w MQ iron /Original SEX monos /Jena Cables /heathkit wm6a/ proAc Tablette 50 sig , with push pull

Offline galyons

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Re: nickel and pinstripe question
« Reply #1 on: January 24, 2014, 07:18:05 AM »
Pin stripe is partially nickel. The nickel laminations are interleaved with the regular. Hence...pinstripes.

Cheers,
Geary
VPI TNT IV/JMW12.7i/FR1 MkII Soundsmith retip >Eros TH+ Otari MX5050 IIIB2 > Eros + ANK Dac2.1 > BeePre >Paramount 300B 7N7 > EV Sentry IV-A

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Offline Paul Joppa

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Re: nickel and pinstripe question
« Reply #2 on: January 24, 2014, 07:38:48 AM »
The alternative is to put all the nickel lams in a bunch in the center of the stack, sort of a single chalk stripe. I think Sowter has one done that way. No idea what the performance difference might be.
Paul Joppa

Offline 2wo

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Re: nickel and pinstripe question
« Reply #3 on: January 24, 2014, 11:32:15 AM »
The alternative is to put all the nickel lams in a bunch in the center of the stack, sort of a single chalk stripe. I think Sowter has one done that way. No idea what the performance difference might be.

That is actually how the BH-5 pinstripes  are done...John
John Scanlon

Offline Paul Joppa

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Re: nickel and pinstripe question
« Reply #4 on: January 24, 2014, 02:07:30 PM »
Hah - I might have know that but if so, I didn't remember it.
Paul Joppa

Offline johnsonad

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Re: nickel and pinstripe question
« Reply #5 on: January 24, 2014, 02:14:05 PM »
The alternative is to put all the nickel lams in a bunch in the center of the stack, sort of a single chalk stripe. I think Sowter has one done that way. No idea what the performance difference might be.

That is actually how the BH-5 pinstripes  are done...John

Looking under the hood John? ;)
Aaron Johnson

Offline Hank Murrow

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Re: nickel and pinstripe question
« Reply #6 on: October 31, 2015, 02:19:59 PM »
I remember that back in 2002 or so Mikey built two pairs of TFA 2004 Jr's with the Cobalt slices(10 or 12) centered in the coil and surrounded by M4; and he reported that they gave 80% of the inductance of an all Cobalt stack for a considerable reduction of the cost of the all-Cobalt TFA 2004 Jr.

I was fortunate to purchase the 10 slice pair and Paul Birkeland built them into a Custom BH 2A3 stereo amp for me with Paul Joppa's trick dual and shunt-regulated power supply with MQ chokes, etc. The amp still impresses me every time I listen, especially with the JJ 2A3-40 output tubes. There are all-Cobalt B7's in the matching Linestage as well. Hope this contributes to the core material considerations here.

Cheers, Hank in Eugene
« Last Edit: October 31, 2015, 02:21:45 PM by Hank Murrow »

Offline Hank Murrow

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Re: nickel and pinstripe question
« Reply #7 on: December 07, 2015, 01:42:42 PM »
Another way of looking at the pinstripe question is that M4 provides a grunt factor, while Cobalt is agile; sort of combining the best of a 18-wheeler with a very light criterium-bicycle.

80% of the inductance of an all-Cobalt tranny for 120% of the cost of M4 alone. I think I have that right, but I will rely on Mike to correct the metaphor(and the figures) if needed. I love his thinking____ and the resulting sound. I have bass flat down to 30 Hz in my room with -4Db down at 24 Hz. That is driving my Blumentein Orca/BUF Sub speakers. I am sure the amp is flat way lower.

Cheers, Hank in Eugene
« Last Edit: January 26, 2016, 05:09:08 AM by Hank Murrow »