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December 18, 2018, 01:23:58 pm

Recent Posts

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Crack / Re: Speedball Big Board TIP-50 insulator cracked
« Last post by Gwymember on Today at 12:02:40 pm »
Cool! Thanks for the amazingly swift reply  ;)
Crack / Re: Speedball Big Board TIP-50 insulator cracked
« Last post by Paul Birkeland on Today at 12:00:35 pm »
That is extremely unlikely to present you with any problems, I would use it. 
Crack / Speedball Big Board TIP-50 insulator cracked
« Last post by Gwymember on Today at 11:54:23 am »
Hi there,

Today I got around preparing the big board from the speedball upgrade. When assembling the TIP-50 transistors to the heat sinks I noticed one of the insulators was cracked. I'm not sure if it's safe to move on with the upgrade, as I'm positive it is vital that the backplate of the TIP-50 is not supposed to make electrical contact with the heat sink. The crack is not all the way through so it might still be okay. But I wanted to have a second opinion from you guys. I sent a picture so you can have a look at it if you find the time. I really appreciate your dedication to the products and the ongoing support you guys provide!
 Unfortunately I cannot post links yet, the picture: https://

Happy DIY'ing,
Legacy Kit Products / Re: Foreplay wiring diagram
« Last post by Entropyman on Today at 04:34:31 am »
Thanks guys.  I may just try to make my own wiring diagram for it.  Some of the workmanship is a bit sketchy, so at a minimum I'll pull it apart and rework the wiring....I have a Welborne Labs Cato pre amp kit as well, which apparently is going to be challenge #2....They've gone ghost, and I cannot find anything on line about the build. Hopefully I have all the parts.....
S.E.X. Kit / Re: My S3X
« Last post by sammyk on Yesterday at 09:22:08 pm »
Thanks for posting this reference Tom, found a lot of useful stuff here that for some reason I couldn't find with forum search. Looking forward to your updates.
Tested with some 22 kOhm resistors, and all was good, so I went ahead with the replacement part build, installed the rest of the Speedball, and everything is working perfectly.

Thanks so much for your help!
Kaiju Stereo 300B amp / Re: Power transformer problem.
« Last post by Raymond P. on Yesterday at 03:09:01 pm »
Update: Got a replacement transformer, installed it, and the amp is back up and running and sounding great. Thanks to the BH crew for their fantastic support.
Power transformer, output transformer, plate choke, and power supply choke (not necessary at all, but the holes were already there).
@PB: What is that in your second pic?  A monoblock tubeless amp?  With 2 power transformers?

Edit: mistook what I now assume is an OT for a PT. Assuming 1PT, 1 OT and 1 Choke, what's the other transformer?
Eros Phono / Re: Subwoofer?
« Last post by d_composer on Yesterday at 09:54:35 am »
Thanks so much!!
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