Request: Eisen Audio Kit Builders BOM for Archive

[aermotor]

I've seen a decent amount of people who built Eisen Kits here.

Eisen Audio kits will be available again sometime in June but this time there's going to be basically no support, so I'm trying to pool together all of the different opamp/transformer/passives combos that people have been using and put it all on a site.

That way for all future builders who need help, they won't be completely out in the dark. Check my site below for an example of how I'm presenting it. Comments to help are welcome.

Eisen Audio DIY 500 Circuits / Aermotor Studio

So there it is, if anyone wishes to contribute their bill of materials that Jens has given them depending on what you wanted to build, or whatever you came up with, that would be great. Then there be a resource for people to know what's needed.

Let me know if anyone has any questions.

[structuredloud]

I think I have one that you don't. Really though, the best forum for this would be group DIY, and not gearslutz. I like your layout though.

[aermotor]

Yea I also posted it over there, but I know I've seen a lot of Eisens on here as well.

[stagefright13]

I'll post mine if Jens steps in and says it is ok.

[aermotor]

... it's a DIY movement with ZERO support. I'm not asking for specs on stuff he has built for people, I'm simply asking DIYers. Oh well I guess.

You do know he already has 4 example circuits on his site right? I sent him an email letting him know what I was doing as well.

[EisenAudio]

Originally Posted by stagefright13

I'll post mine if Jens steps in and says it is ok.

I say it's ok. As long as proper credit is given (e.g. "BOM xxx" by Zach, "BOM yyy" by Jens, etc.), then I have no qualms with something that'll lessen my inbox burden and empower the DIYers. That's precisely what I'm going for with DIY500mkII.

Zach, I owe you an e-mail; give me some time... and thanks for doing this!

[aermotor]

Awesome thanks Jens, much appreciated!'

Just need to get people on board now......

[stagefright13]

Modern 512 clone here it is BOM by Jens:

Input: Jensen JT-115K-EPC
Op Amp 2520 or Fabio 2520
Output Cinemag QMOQ2S

R1 = 1k ohms
>> R2, R3 = 6k8
>> R4, R5 = 620
>> R6 = 162
>> R7 = N/A
>> R8 = 162k
>> R9 = 1k
>> R9a = 1M
>> R10, R11 = jumper
>> R12 = 10k
>> R13 = 100
>> R14, jumper
>> R15, R16 = N/A
>> R17 = 1k5
>>
>> J1 = N/A
>> J2 = 47 ohms
>> J3 = short
>> J5,J5 = N/A
>>
>> D1, D2, D3 = 1N4003
>>
>> C1 = 10uF or greater, 63V radial electrolytic
>> C2, C4 = N/A
>> C3 = 10uF, 16V or greater bipolar/non-polar radial electrolytic
>> C5, C6 = 100uF, 25V or greater radial electrolytic
>> C7 = 100pF 50V C0G/NP0 ceramic
>> C8 = 330uF 10V bipolar/non-polar radial electrolytic
>> C9 = 470uF 16V bipolar/non-polar radial electrolytic (note:
>> height above PCB surface must not exceed 25mm)
>>
>> C1, C5, C6, C8, and C9 can all be bypassed by 0.1uF 50V radial
>> film caps (5mm lead spacing)

[gm5k]

have those of you w/ the 512 clones gotten to directly compare them to a real 512? id be curious to see what people thought

i love all my Eisens. I've got 6 pre's and 2 EQ's

2 Eisen Neveish's into a 57 and a 421 on a guitar cab=Heaven

[aermotor]

I don't have any of the 512 style. Care to share the BOM?

[bdubya]

I have two types:

jlm 1:4, forssell jfet-992
cinemag cmqee-3440a, forssell jfet-993

neither utilize output transformers. they sound cool in very different ways. I have the BOM . . . somewhere. could have sworn it was attached to an email . . . but I'll post them for sure once they surface. I've never used API anything, and thus have no reference for their relative sound to these. Props for doing this, by the way. Was hoping someone would.

ben

[bdubya]

Yeeeeahh. I don't know where the hell they went BUT I got the new diy500 kit. Looks pretty nice. xlr on the front panel (which wasn't there on the first one) and a dedicated spot for St. Ives/Marinair input iron. This changes my plans, was going to do a second jlm14, forssell992, but I'm gonna bite off more than i can chew and buy one of those 31267 from sonic circus. pair it with a purple op-amp and something steel on the output. Also, the component specifications link on the eisen site was hugely informative, much more detailed. Oh yeah, and it appears to have the footprint for a bourns potentiometer as well as for the one jens includes in the kit (which is apparently a pain to find, otherwise.) The faceplate is raw, unpainted, which is kind of cool, but unexpected. Anyone know what type of paint to use to finish it?? Anyhow, pyched to build another one. Highly recommended

bw