Search found 22 matches

by trenchrecordings
Sun Jan 01, 2017 7:09 am
Forum: JLM Audio Kits
Topic: Go Between and Go Between Plus kit BUILD THREAD
Replies: 29
Views: 42174

Re: Go Between and Go Between Plus kit BUILD THREAD

I have a separate power supply to supply +48V to the Go Betweens. Do i need to run a 0V wire back to that power supply ? Or will it find ground through the xlr ground pin to the mic preamp and its ground ?
by trenchrecordings
Sun Feb 14, 2016 11:00 am
Forum: JLM Audio Kits
Topic: AMP HEAD Build Thread
Replies: 87
Views: 109652

Re: AMP HEAD Build Thread

I ordered the parts and built this pcb. Its not working. Sounds like a 8 bit motocycle reving up on the headphones when it powers up. Signal does not pass through. When i unplug power I can hear a distorted signal for a second before power dyes off. Confirmed that it is getting +16V 0V and -16 using...
by trenchrecordings
Tue Feb 10, 2015 1:08 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 245
Views: 258920

Re: JLM 60Watt Power AMP Kit

works great. thanks Joe. Amazing response time by the way!
by trenchrecordings
Mon Feb 09, 2015 1:08 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 245
Views: 258920

Re: JLM 60Watt Power AMP Kit

Ok great. Thanks for the info Joe ! I dug up these wall warts from my junk pile. Input 120V AC 60Hz - Output 12V AC 1000mA Input 110/117VAC 15W - Output 16V AC 500mA Input 100-240V 50/60Hz max 700mA 50VA - Output 12V DC switching 2A What would be the best choice ? the DC switching supply is DC alrea...
by trenchrecordings
Mon Feb 09, 2015 12:10 am
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 245
Views: 258920

Re: JLM 60Watt Power AMP Kit

How about a 18v wall wart plug if I can find one laying around?
by trenchrecordings
Sun Feb 08, 2015 2:10 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 245
Views: 258920

Re: JLM 60Watt Power AMP Kit

what size transformer can i get away with bare minimum ? Thinking i might just use this for a bench / test tone speaker.... and listening to tunes while soldering. Also specs on a woofer/tweeter on the cheap ? I'll upgrade it down the road

-Dave
by trenchrecordings
Tue Aug 06, 2013 3:29 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

I got everything balanced and got rid of the ground hum between my vintage mixer, passive speaker switcher and three sets of monitors. Now I just have to play around with op amps and see what I like best. Sounds great, good stuff !
by trenchrecordings
Thu Aug 01, 2013 3:54 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

ok so I see signal at the transformer +P +S jumper but not at the balanced out ? I guess the relay is stopping it ? I'll desolder it and jump them
by trenchrecordings
Thu Aug 01, 2013 5:02 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

Hey Joe,

One more question. I'm somewhat concerned about the electrolytics in the audio path. Do you think they negatively affect the sound ? can they be removed or replaced with film ? C1, C2, C5 and C12, C13
by trenchrecordings
Fri Jul 19, 2013 9:09 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

Nothing like a little smoke show :) Ok Joe ill send you an email tonight

Thanks,
Dave
by trenchrecordings
Fri Jul 19, 2013 5:55 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

Those 2520 are dead as well :) After probing around it seems pin 4 is -16V and pin 7 is out. I probably should have jumpered pin 1 out to pin 3 ?
by trenchrecordings
Fri Jul 19, 2013 4:29 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

burnt two dingos, r24 and r23 on both. Two different 2520. Voltages were good +16VDC on +V1 and -16VDC on -V1 from the powerstation. These were the two that i jumpered IC2 dip pin 4 to 7. At first I had both dingos powered up and I noticed -V1 was only 1.5 Volts. So I disconnected and tested the pow...
by trenchrecordings
Thu Jul 18, 2013 4:41 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129454

Re: DINGO PCB and kit BUILD THREAD

And on the same note. Daisy chaining the 48+ 0V in to 8 go betweens will be ok ?

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