Search found 9 matches

by Jonk
Thu Sep 09, 2021 5:57 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

So, what would you expect to need to be replaced besides the power transformer? Caps as well? Not seeing them puffing out though.
by Jonk
Thu Sep 09, 2021 5:54 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

Okay,

back with some ohm readings. Sounds like you're right (I think?) One primary reads 16ohm. The other is 91ohm.
by Jonk
Tue Sep 07, 2021 2:29 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

Thanks Joe, Here's some pics. This was a successful build, calibrated correctly and powering four Neve 1290 cards for about 6 months. Then one day I powered it on and the fuse blew. So I suspected that slide switch. So, if I get you right, the correct pads to jumper for 115V would actually be on the...
by Jonk
Mon Sep 06, 2021 5:39 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

This can't be right. I have 51VAC, 54VAC, 56VAC, 62VAC on the power transformer secondaries. ??? Maybe I hard wired the pirmaries wrong. Okay, it's a DPDT slide switch so I hardwired the side that says 110V. I don't get it. . .
by Jonk
Mon Sep 06, 2021 4:44 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

Hi, I have a power plant here that was blowing fuses (unloaded so I know it's the power plant) I replaced the 110/220 switch and it stopped blowing fuses but I couldn't adjust the regulators for 24 and 48V's They only go up to 17VDC and 35VDC respectively. I tried replacing the regulators to see if ...
by Jonk
Sat Aug 17, 2019 6:20 am
Forum: JLM Audio Kits
Topic: POWER PLANT BUILD THREAD
Replies: 41
Views: 105933

Re: POWER PLANT BUILD THREAD

Concerning the spot marked "case," I'm assuming this is the one and only connection to chassis from the power supply board. Can the AC mains earth ground still connect to chassis right by the IEC input connector like usual, or do I have to route it to this "case" spot on the power plant board? Same ...
by Jonk
Sun Aug 02, 2015 9:38 am
Forum: JLM Audio Kits
Topic: JLM 111DC as SS Pultec output?
Replies: 1
Views: 8447

JLM 111DC as SS Pultec output?

Hey Joe, I have a couple Solid State Pultecs that I've built up (with API 2520's) The original output transformers were Triad HS56. 1:1 600 ohm. I happen to have a couple JLM 111DC transformers here. What do you think about possibly using these as the outputs? If they would work, how exactly should ...
by Jonk
Fri Jul 10, 2015 6:22 am
Forum: JLM Audio Kits
Topic: PM2000 EQ mod kit Build Thread
Replies: 2
Views: 14918

Re: PM2000 EQ mod kit Build Thread

Hey Joe or anyone else, I'm curious about the mid eq mods on the PM2000. I have some that I bought from you a long time ago and they sound great. Now, I'm doing some upgrading of the IC chips in the PM2000. My question is: I'm pretty sure that the mid eq mods don't bypass IC8 and IC9 right? I can't ...
by Jonk
Sat Oct 05, 2013 2:55 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 124
Views: 348689

Re: Regurgitator kit Build Thread

Hey Joe,

Is the purpose of the regurgitator to convert, say, modern impedance outputs so they play nice with 600 ohm inputs, like on the LA2A, Pultec etc?

That would be extremely handy if so. I haven't found a lot of options around for that sort of thing.