The Amp Garage

Cygnus X1 wrote:Hey!

Cool to see you here.

haha, nice to see you here too man.

but tbh,.. i don't like it here as much as on MLP

someway of reliably measuring the plate and screen current for the 6L6 would be a good idea. With that 1k bias pot, its hard to work out what the actual tube current is at any given point on the dial. The 10Vdrop across the 1st (100R) supply resistor indicates 100mA current at that point, most of w...

So i have been messing around with an AX84 SEL build lately and it sounds pretty great, but not as great as it could! so i reworked the schematic a little and tweaked here and there, changed the switching to independent gain controls for clean and mean mode... blablabla.. I ended up with something p...

is it a Single ended or Push-Pull OT ? depending on that would also be how much power the OT can handle. 7591 have a maximum plate dissipation of 19 Watts i think. a primary Impedance of ~4K could work well with 6L6 in Class A or if it is SE (parallel) you could run it asymmetrically, which i hear s...

Any Idea what kind of changes might be needed to use a 6BM8? I know its supposed to be pretty similar to a 12ax7 and el84 in one. check this http://www.sophtamps.ca/mambo/index.php?option=com_content&task=view&id=29&Itemid=42 here the schematic from the page: [img:1655:1269]http://www.sophtamps.ca/...

ncusack wrote:Does anyone know if you could build something similar to the mini-wreck using a 6BM8 in place of the el84 and 12ax7 in v2?

sure, it has been done before, i saw a schmatic using an ECL86 somewhere

i was thinking of building something like the derailment 2, but with a different tonestack , working on the schematic right now. has anyone ever built one of these ? or tried a wreck preamp with a cathode follower as 4th stage ?

so i fixed all the errors in the layout and built in in my old test chassis... result: kinda cool, but not very versatile sound... i think i might wanna go for a FMV-style tonestack and a second preamp tube. i hear some people have tried a SE version of the trainwreck express, so i did some searchin...

Sooooo,... i spent the major part of today doing a layout in sPlan 7, its the first version and might be full of errors, but it shows the idea ^^ What do you guys think ? does anyone see any major flaws ? [IMG:159:113]http://i1123.photobucket.com/albums/l552/asdain/Amp%20builds/th_loewenherz-1-rev08...

Ok i updated the rev 0.8, i think its build ready now ^^ i will put in an an old battered 'test' chassis first and test a few different components / values. the cabinet will be a slightly modified and non tolexed 5e3 cab. im not sure about the speaker yet,.. any suggestions ? [IMG:159:113]http://i11...

ok i switched back to the 5f2 tonestack with a mod i found on the internet (but with 500k potis for now) and incorporated the VVR instead of a MV

[IMG:159:113]http://i1123.photobucket.com/albums/l552/asdain/Amp%20builds/th_loewenherz-1-rev08.png[/img]

Just a couple minor observations ... I see what appears to be a lot of NFB, when the feedback knob is at full. Maybe increase R17 a bit, or put a series resistor with R13 to ground for the FB point. the value of R17 and the whole NFB structure is taken from the Princeton 5f2a Schematic, i merely ad...

Thanks for the 2 cents ;) i will experiment with both higher and lower plate-loads. the one 12ax7 should be enough to drive the 6l6 hard, although im not sure if thats still true when i use the moonlight tonestack, because it hase a lot of damping i think at least -9dB.. i wanted to stick with a one...

Hello Amp Garage Community, I Had a Hammond 370HX, and a 125ESE lying around and decided to build a little something with a single ended 6L6 GC. so i looked up a fender 5f2a and started to tweak the design a Little and this is how it looks now: [IMG:159:113]http://i1123.photobucket.com/albums/l552/a...