Tube Amp Archive

devilsindetails wrote:Thanks ISOTone!

you're welcome.

looking at the 3rd pic, albeit out of focus, it looks like the 6DQ6 were subbed with EL84/6BQ5. blu and brn - plates - blue pin 7 outer tube, brn pin 7 inner tube wht/red wire - screens strapped pin 9 to pin 9 wht/grn wires cathodes - strapped pin 3 to pin 3 yel wires - control grids - one phase to ...

> has anyone ever tried par-metal.com? yes, decent products. no complaints with the 10 series cases. the 12 series cases are a PITA because of the inner front panel. have read both horror stories and praise on the "custom" sizes. if you stick with off the shelf lines and sizes you might be saving y...

looks cool - kind of buckish though. split x and split y for high gain designs might be worth investigation. they can anodize in just about any color. order extra front or back panels for layout tweaking. https://www.landfallsystems.com/index.php split y chassis 10" (split into 2 x 5") x 24 long x 2...

+1 for e-plastics. CNC cut for $15.00 for up to 9 cuts + board cost: no one else comes close. i've purchased .190" and .125" G-10 from them. excellent customer service, workmanship, tolerances, and turnaround time. added bonus of CNC cut material is that the cut edges require much less finishing wor...

careful what you use. some epoxies are/can be electrically conductive. i used to make living building HVAC hybrid bridge, SCR and Tyristor ckt. assemblies - we molded the sub-assemblies in plastic cases with epoxy. we used products made by epotek (epoxy technology). it's pricy and kind of a bitch to...

the barrier strips work. well. the photos below are of a 4E27A based 35W class A1 single tube AF amp being prototyped. B+ was at ~~540V employing cathode biasing with bypass to improve drive requirements. the 4E27A is a directly heated pentode and the filament draws ~~7.5A @ 5VDC. the driver is a 8p...