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Hi : I have been having some very irritating issues with my LSS, it's a beautiful sounding amp but worthless if unreliable. I've documented what I did in case anyone else experiences a similar iassue, I'm pretty sure I'v got it licked, but you never know :) The issue was the amp would cut in...

Anyone know if it is serial or parallel ? Thanx Scott

Thank You

Hi All Does anyone know where I can source LDR's for my DC-3 ? I am having switching problems and by the diagram I don t see what else it can be. Thanx Scott

I am also learning some sweep techniques after putting it off for 20+ years, I kinda agree with the guy about emotionless playing but it does have a lot of very musical uses like fills, lead ins, lead outs etc. You can also kind of emulate a piano's right hand. I think the reason I was...

+100 I hated the IV for that. It was made to please those who are twiddlers and anyone who isnt is F(&*ed. S

Could I get the Schematic for the DC3 Bias mod, The one you posted must be for the 6L6 Version as my drawing : http://www.schematicheaven.com/boogieamps/boogie_dual_caliber_dc3.pdf . Has no 22K to ground :(. [email protected] Thanx

Hi can anyone tell me if I am correct in my assumption that I can replace the 33k in the bias supply with a pot to control the bias voltage, or would that give me too little adjustment ? Maybe I need to vary one of the 220k's on each pair ? From this drawing...

Can someone please repost the DC-3 adjustable bias mod ? My baby seems a bit hot... Thanx in a advance. Scott

Funny, I dont see any LDRs... Or are those Orange relay looking things the new outline ?

I like the DC-3. 6L6 amps are too raw for me. EL84 Power section is the way to go. I used a DC-3 for about 5 years and loved it. A storm took it and I "upgraded " to a Mk IV and since then(5 years) have never been able to get those sweet tight compressed singing tones the DC did so well and...

I went from a DC-3 to a mark IV and regretted it. I've played the MKIV for about 5 years now and I have never been entirely happy with it. I've tried tons of different tubes and El34 substitutions but could never achieve the tone my DC had. I think they are a very strong flavored amp and taste...

Could someone send me the Series Effect loop drawing ? [email protected] Thanx

I use a Keeley right after a TS-9 (homemade). I use it mostly on the clean channel and occasionally on the dirt.

I think you are right there is a 220K resistor that is shared on both tubes bias circuit on the left and the same on the right. If I am reading the diagram correctly it looks like the Vneg-220K - 220K -2.2M-Gnd forms a voltage divider and the outer tubes come off the 2.2M / 220K junction and...

Thanx stokes, good detailed info , but I am unclear on one thing. Why do you say the inner tubes biased hotter ? Shouldn't the tubes(outside) that are near class A be hotter ? Or am I not getting something very basic. Looking at the diagram it seems to me that the outside tubes have a lower neg...

A million questions arise .. -So, How do you bias these simulclass amps ? -What idle current should the "class A" tubes be drawing ? -What about the others ? -If I just put a control on the bias supply then I will be changing the bias of all tubes at once, but what am I shooting for ? -Do I...

I am trying to understand the Simulclass Power section in my MkIV, if someone has time could they help me out ? By Looking at the diagram at : http://www.schematicheaven.com/boogieamps/boogie_mkiv.pdf Please tell me if I am wrong. 1) It appears to me that one set of tubes is run as Class A...

Ok, I'll try at rehearsal tonight, but I am doubtful, as one side is working OK. Wouldn't the left and right be summed with a couple resistors before reaching V2b? Thanx S

Hi I have a Mark IV - a while back the right return channel of the effects loop stopped working. The Mk IV drawing I have shows a different effects loop setup than my amp. My amp a Mono Send, and Stereo/Mono return, the drawing I have shows a "normal loop / Switched loop configuration. Does...