Search found 2067 matches
- Wed Apr 27, 2011 11:56 am
- Forum: JLM Audio Kits
- Topic: BAN Build Thread
- Replies: 132
- Views: 413140
Re: V8 Opamp
What performance difference does the V8 opamp yield in the BAN pre? Using, say, 4 2604's as opposed to just one. For that matter, using 4 of any opamp instead of one. What difference does the increase produce? V8 is great for driving very long cable runs or step up output transformers. Other wise I...
- Wed Apr 27, 2011 11:53 am
- Forum: JLM Audio Kits
- Topic: MAC RACK KIT with Green MAC & DINGO PCBs Build Thread
- Replies: 62
- Views: 202658
Re: MAC Build Thread
Hi Joe, thankyou again for your prompt reply! I've tested the 4 x ZD 24v1w and the two on the left Dingo are measuring 0.0 ohms, and one on the right dingo measures 1.4k...(the other 9.98k - ok?)...so best to replace the first three...?? Sent you 8 x 24v 1w zeners and IDC cable end overnight today....
- Tue Apr 26, 2011 3:30 pm
- Forum: JLM Audio Kits
- Topic: Go between kit 2 questions
- Replies: 8
- Views: 20657
Re: Go between kit 2 questions
Mute works great and silently with the two bottom legs removed but when the 48v is engaged and switching mute on and off massive click occurs. Any remedy for that ? grounding one of the free legs ? thanks Not sure what mic pre input type you have but adding 2 x 100k. One between each middle switch ...
- Tue Apr 26, 2011 3:02 pm
- Forum: JLM Audio Kits
- Topic: MAC RACK KIT with Green MAC & DINGO PCBs Build Thread
- Replies: 62
- Views: 202658
Re: MAC Build Thread
Hi again, Before I hooked up the Dingo to Mac PCB with the ribbon cables, and before I plugged in the 99v's I tested the V+ & V- as per instructions on the Dingo PCBs; both read +24v and -24v respectively. The green power LED was lit solid on the front panel. OK this proves the dingo and 24v 1w zen...
- Tue Apr 26, 2011 8:24 am
- Forum: JLM Audio Kits
- Topic: AC/DC & POWERSTATION KIT BUILD THREAD
- Replies: 350
- Views: 808672
Re: AC/DC & POWERSTATION KIT BUILD THREAD
Hi, a couple of questions, firstly what heat sinks should I use obviously this depends on the voltage drop the regulator has to perform, but in terms of the size as It looks like the regulators are very close together and I fear that I wont be able to get a heat sink thin enough? I need heatsinks b...
- Sat Apr 23, 2011 2:57 pm
- Forum: JLM Audio Kits
- Topic: MAC RACK KIT with Green MAC & DINGO PCBs Build Thread
- Replies: 62
- Views: 202658
Re: MACSCH.pdf
Oh - can any one on a Mac open MACSCH.pdf...?? I've tried browsers, Preview, Adobe Reader v8, Word, Photoshop with no luck... Photoshop says; 'doc has security setting which prevent it from being opened' (I'm OSx10.6) Cheers, Nathan... :roll: Need free reader 9.1 or later to open PDF. Not sure what...
- Wed Apr 20, 2011 12:42 pm
- Forum: JLM Audio Kits
- Topic: DINGO PCB and kit BUILD THREAD
- Replies: 112
- Views: 368635
Re: DINGO PCB and kit Now Available
But I am not sure what the unbalanced device is that the dingo is connected too? But if it is passive then that is usually fine. The unbalanced out feeds a 5k T pad rotary switch. I would like to have as much headroom as possible on the output. A +21dBu clip point at the unbalanced input would be i...
- Wed Apr 20, 2011 11:33 am
- Forum: JLM Audio Kits
- Topic: DINGO PCB and kit BUILD THREAD
- Replies: 112
- Views: 368635
Re: DINGO PCB and kit Now Available
Thanks Joe. It turns out I need 11dB of gain. I was playing around with it and changed R16 to 5k1. This puts 11dB somewhere in the middle of the trim pot range. Is this okay? Or would it be better to leave R16 at 20k and change R4 and R6 to 10k for a 6dB drop and leave the output section alone? Cha...
- Wed Apr 20, 2011 10:50 am
- Forum: JLM Audio Kits
- Topic: DINGO PCB and kit BUILD THREAD
- Replies: 112
- Views: 368635
Re: DINGO PCB and kit Now Available
I built a some Dingos and am getting a minimum gain of 12dB from the second adjustable stage. Is this correct? Yes with RV2 gain trimpot fitted and wound down to minimum gain. This is because the output amp adds the inverting signal which adds 6dB and fitting the gain pot also add 6dB gain to the o...
- Mon Apr 18, 2011 10:21 pm
- Forum: JLM Audio Kits
- Topic: Go between kit 2 questions
- Replies: 8
- Views: 20657
Re: Go between kit 2 questions
Facing a new problem . build two go between kist , one modified with mute thing , other original. Both give a slope from around 800hz down when the -20 pad is not active . Kits are dated 2005 There are only resistive elements on the GO Between kit so it makes no frequency dependent component. So me...
- Mon Apr 18, 2011 9:49 pm
- Forum: JLM Audio Kits
- Topic: JLM Transformer mods for GAP 73, CL 7602 Mk1 and Mk2
- Replies: 7
- Views: 29408
Re: JLM Transformer mods for GAP 73, CL 7602 Mk1 and Mk2
sorry, I did not understand how to connect the wires to the output transformer, thank you! The numbers shown on the above photo are the numbers on the JLM111DC transformer that the wire needs to be moved too so the old transformer can be removed. So best to add paper tape on the wires to write the ...
- Mon Apr 18, 2011 7:31 pm
- Forum: JLM Audio Kits
- Topic: Go between kit 2 questions
- Replies: 8
- Views: 20657
Re: Go between kit 2 questions
Hi everyone. Two questions about the Go between kit. Build when smoothly , all functions are working properly but I have a loud click when switching 48 on. Bad cap , ground issue ? Phantom power will always make a click or pop as you are powering up the microphone which is unpredicable as it powers...
- Thu Apr 07, 2011 1:49 pm
- Forum: JLM Audio Kits
- Topic: AC/DC & POWERSTATION KIT BUILD THREAD
- Replies: 350
- Views: 808672
Re: AC/DC & POWERSTATION KIT BUILD THREAD
OK then I have been doing this wrong the whole time....500mA blows right away. I always get confused by the way manufacturer label the secondary of a transformer. Here is what I am using http://www.apexjr.com/images/66938_sc7.pdf Here is how I hook it up: On the AC side of the JLM AC/DC secondary R...
- Thu Apr 07, 2011 11:35 am
- Forum: JLM Audio Kits
- Topic: AC/DC & POWERSTATION KIT BUILD THREAD
- Replies: 350
- Views: 808672
Re: AC/DC & POWERSTATION KIT BUILD THREAD
Thanks for the help Joe! Yes I have Heatsinks (not too big) but they are there. I'll have to stick my finger on them to see how warm they get. Let's just say they do not get hot then.... Most of the small individual heatsinks that will fit without touching each other on the AC/DC will not be big en...
- Thu Apr 07, 2011 7:54 am
- Forum: JLM Audio Kits
- Topic: AC/DC & POWERSTATION KIT BUILD THREAD
- Replies: 350
- Views: 808672
Re: AC/DC & POWERSTATION KIT BUILD THREAD
Hey Joe, I am using the OLD AC/DC (one in the photo of your reply above 2004 version) for a supply to a TG1 build. Which is +/- 28VDC Currently I have this Avel Lindberg 28-0-28 2.67A transformer on it. My circuit is sagging the + supply! So the transformer must be too low? I think? That transforme...