JLM AUDIO

Hi Bob I did draft a longish reply to this but didn't post it as it got a bit rambley. The simple answer is that yes, you could use a DINGO board to take the balanced output from your 7th circle, go through the EQ project of your choice, and use the DINGO to balance the output. With judicious fiddli...

Paul

This should not be happening, its certainly not normal BA operation. Can you post some pics of your gain pot wiring and also the top and bottom of your BA build?

Hi there Luke There are two 47uF caps which end up underneath the 99V opamp. Their pads are extremely close to those of several resistors (a 10k and a 51R each). I have soldered these in and there look to be shorts between the outside legs of each 47uF, and the nearest 10k to each, and the leg of ea...

Hi JimiB Of course it is possible to put in a send/return loop, but what would be the point? And I'm not sure what you mean by parallel - parallel to what in the preamp circuit? This is a single variable gain stage design (the second half of the opamp is effectively a 2:1 gain but its role is really...

Cool!

Good to know they are now working well.

That's what the instructions say - my BA boards pre-date this, so I've never done it, but yes, you need to physically cut the pcb where indicated by that small horizontal yellow line to break the trace (when I've had to do this for other projects, I have used a sharp, small bladed knife or a very sm...

Are you saying you have not implemented any part of the "hum fix"? It addresses two issues - one relates to C16 (an electro DC blocker, hence "hum" fix) where you cut a trace and put a link to 0V, but the other is to mount the transformer's load capacitor (CL) on the underside of the PCB. If you hav...

Yep, horizontal in a 1U is fine if you like edgewise meters. You could easily stack 2 in a 1U case for stereo metering. But its really a question of design and function - metering is an important issue for sure, but front panel space is premium, and just because you can does not mean that you should...

Guys and gals, just remember that this thing is 3U high - its lovely and all that, but getting into a case with all your other stuff may be a design issue. Sorry, don't want to rain on the parade. The thing is that its range allows for a huge sensitivity. I can see it in mastering / mixing applicati...

Well you've certainly got some flair for panel design - I always end up with a very severe utilitarian look. I think you've got a good look going there.

OK - I know Joe does this for the TMP8, but how is it done?

Is it a great big secret or can we little DIY people get in on the act? I'd like to add some to my BAD outputs.

Muchos fun by the looks. Design looks funky, so well done on that. In fairness to Joe, I now make sure I do not use the JLM logo design in a way that might suggest that the product is fully JLM built. I have no issues with stating that something is "JLM", I just don't use his logo design. We out her...

Try the TG500

It short, no. To nicely record a group that size, you need a microphone with an omni pattern, and good sensitivity, and that means a condenser microphone - but condensers need to be powered either from a preamp or from a battery, and a cassette dictaphone can't do that. You'll also need a special ca...

Yes, Fig 3 is what my comments were aimed at as well. Just watch out where you are putting the gain control. You can't use the DINGO's normal gain, because that is structured as a non-inverting buffer, not as a virtual summing point. If you want gain in the virtual summing, its controlled by the res...