Tube Amp Archive

Yes, in fact I got the total price from Heyboer including shipping. As the transformer set is very heavy, shipping costs to Europe are quite high, that's the reason why I was thinking of using this two transformers I have available.
Thanks.

Hello, I have two transfomers lying around from another project, and i am planning using them building an asteroid amps, along with some surplus components I have: -Sprague Atoms, Alpha pots, Xicon carbon film 1W resistors,Mallory 150's (everything correct value). The PT specs are: -350-0-60-350 (28...

Hello, I have two transfomers lying around from another project, and i am planning using them building an asteroid amps, along with some surplus components I have: -Sprague Atoms, Alpha pots, Xicon carbon film 1W resistors,Mallory 150's (everything correct value). The PT specs are: -350-0-60-350 (28...

I modified the signal cap afetr the second stage, installed a 220K/220K voltage divider, modified the power rail resistor to get the same voltage values as in a Blackface SR. I've tried 0,01 and 0,001 input PI caps, as both values are used on different versions of SR and 0,001 works best. Makes the ...

Thanks for the info. Yesterday I tried changing the first cathode bypass cap from 25mfd to 1mfd Solen PP, and modified the tonestack (0.1 to 0.022, and 0.022 to 0.047), using the Tonestack Calculator 1.3, and sound improved, as pots now work between 3 and 7 o'clock. Today I will try modifying the PI...

YEs, I had the screens of the tubes attached to the UL taps of the Heyboer OT (I think 70%). When I installed a choke on it, as it hadn't, I forgot to change the screen resistors and left the older 470 ohms. Yesterday I installed 1K-5W Dale resistors on them, changed the feedback resistor from 820 o...

Thanks, Yes if you look at the data from TDSL it says no more than 500V plate, and no more than 400 V screen. Original Route 66 has 1K5 grid stoppers and screens attached to UL taps (70%) through 470 ohm resistors. JTM 45 KT66's amp has 5K6 grid stoppers and two 470 ohm resistors in series with one ...

Hi, I've recently built a Root 66 clone which I didn't like (lifeless and dark sounding), so I decided to modify it , preserving the most expensive items. I changed the preamp and PI to a Fender Super Reverb type without reverb, with a 12AX7 and a 12AT7, keeping just one treble, one bass and one vol...

Hi, Have any of you any spare adjustable lug for the 100W/25 ohm resistor (Mouser code 588-2125E)? When I ordered the items for building one Airbrake, Mouser didn't have enough units in stock and the price for sending only one lug to Spain is extremely expensive. If you have one, you could send me i...

Hi, Have any of you any spare adjustable lug for the 100W/25 ohm resistor (Mouser code 588-2125E)? When I ordered the items for building one Airbrake, Mouser didn't have enough units in stock and the price for sending only one lug to Spain is extremely expensive. If you have one, you could send me i...