100uF Capacitor for 12000 Phase Inverter

Krinkle · Post by **Krinkle** » Sun Jan 18, 2015 10:20 pm

Friedman says the 12301 phase inverter cap is an LCR 100uF. Aren't those obsolete? What are you VH addicts using and where are you getting them. I just looked at all of the major tube amp suppliers and nada.

I have a 32uF right now and it's 1" diameter. I'm hoping I can get something in the same size. Were the LCRs 500V?

jnew · Post by **jnew** » Mon Jan 19, 2015 1:04 am

Likely a dual 50uF. I have 4 or 5 of them. Not sure what they measure though. Probably close to an inch.

Roe · Post by **Roe** » Mon Jan 19, 2015 4:08 am

the LCR 50+50 500v caps are similar to the F&T except they are taller

Carbia · Post by **Carbia** » Mon Jan 19, 2015 6:09 am

http://www.tube-town.net/ttstore/Capaci ... :5033.html

It's more than an inch, 30mm...

Krinkle · Post by **Krinkle** » Mon Jan 19, 2015 9:32 am

jnew wrote:Likely a dual 50uF. I have 4 or 5 of them. Not sure what they measure though. Probably close to an inch.

Thanks James. Where did you buy them, or are these old/obsolete LCR 50/50's you're talking about?

Tazin · Post by **Tazin** » Mon Jan 19, 2015 10:03 am

I agree, I think Dave was also probably talking about a LCR 50+50uF/500v cap. The LCR cap is 1-3/8 inches (35mm) in diameter and 2-15/16 inches (75mm) tall excuding the solder tabs.

rgorke · Post by **rgorke** » Mon Jan 19, 2015 10:07 am

I use an Erie 100f from Valvestorm here in the NOS section.

http://valvestorm.com/NOS%20and%20Rare%20Stuff

adding this to the PI made a huge difference in tightening things up.

neikeel · Post by **neikeel** » Mon Jan 19, 2015 10:15 am

I've got some 100uF LCRs NOS but they are pcb spike type tabs

Krinkle · Post by **Krinkle** » Mon Jan 19, 2015 10:24 am

Tazin wrote:I agree, I think Dave was also probably talking about a LCR 50+50uF/500v cap. The LCR cap is 1-3/8 inches (35mm) in diameter and 2-15/16 inches (75mm) tall excuding the solder tabs.

Thanks for the replies everybody, I really appreciate it.

So which one is the best for me at 100uF?

https://www.tubesandmore.com/products/C-EC50-50-500

https://www.tubesandmore.com/products/C-EC100X2-500

https://www.tubesandmore.com/products/C-EC100X2-500FT

https://www.tubesandmore.com/products/C-EC50-50-500FT

https://www.tubesandmore.com/products/C-EC100-385

Also, except for the last link, these are all 1 3/8" diameter. Will these work in my 12000 chassis if I use this?

https://www.tubesandmore.com/products/S-H122

Strat78 · Post by **Strat78** » Mon Jan 19, 2015 11:17 am

neikeel wrote:I've got some 100uF LCRs NOS but they are pcb spike type tabs

If you want to use what Dave used, Neil is your man.
Or scroll down to the ARS or Erie cans here:
http://valvestorm.com/NOS%20and%20Rare%20Stuff
You will need a bigger ring and will have to drill two new holes, no way around it.

shakti · Post by **shakti** » Mon Jan 19, 2015 12:22 pm

rgorke wrote:I use an Erie 100f from Valvestorm here in the NOS section.

http://valvestorm.com/NOS%20and%20Rare%20Stuff

adding this to the PI made a huge difference in tightening things up.

Those are only rated for 350V IIRC...you may or may not run into problems in the PI where the voltage could easily exceed that. Depens on your PT, variac or not etc.
I do greatly prefer 100 uF over 32 uF in the PI myself on these amps.

Krinkle · Post by **Krinkle** » Mon Jan 19, 2015 1:16 pm

shakti wrote:
rgorke wrote:I use an Erie 100f from Valvestorm here in the NOS section.

http://valvestorm.com/NOS%20and%20Rare%20Stuff

adding this to the PI made a huge difference in tightening things up.
Those are only rated for 350V IIRC...you may or may not run into problems in the PI where the voltage could easily exceed that. Depens on your PT, variac or not etc.
I do greatly prefer 100 uF over 32 uF in the PI myself on these amps.

I'll end up with one of the caps from AES, as I'm buying the rest of the parts from there to bring my friend's metroamp kit up to DF VH spec. I'll drill/file if I have to, I already have an extra hole in the chassis for a different choke. It's a Metro kit so it's not like it's a collector piece, as much as I love it.

jnew · Post by **jnew** » Mon Jan 19, 2015 4:41 pm

I gave Jeremy a dual 50uF for his PI position and I think he only needed to only drill 1 extra mounting hole for it to work. No big deal IMO.

I don't really recall where I got them but I think I got them on e-bay back in like 07 or 08 for a Small Box 100 watt project.

danman · Post by **danman** » Wed Jan 21, 2015 6:15 pm

I bought a couple of the LCR 50/50 500v caps from HiFi Collective last month for $25.00ea. They are formed and tested and worked out great in my 1986.

awangotango · Post by **awangotango** » Mon Jan 26, 2015 1:38 am

so when you guys use 100uf in the PI, do you still drop down to 32uf in the pre and screens? and keep mains at 100?

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