The Amp Garage

the pcb in my Express is a VVR from Dana. It wanted to mount it at a 90 degrees angle to the chasis, but I realized too late that it interfered with the PT secondaries so I rotated it to it's present position....

I did this....

I have recently installed one of these in a 4-0-0

https://www.tube-town.net/ttstore/Kits/ ... bl7lbh8u97

I like it a lot, not the amp, but the cab simulated line out.

P.

I used London Power's SB1 which is no longer produced, I think it has been substituted by SV1. Works fine. I think Dana's VVR would work fine too if used to regulate just the PA section.

P.

Attached is the schematic of my K50 with VVR and footswitchable speed.

P.

I live in Madrid.... You just have to pay VAT to the carrier when your OT arrives. You can get the tubes in Europe at http://www.banzaimusic.com/search.php?mode=search&page=1 , http://www.uraltone.com/catalogsearch/result/?q=6SN7GTB , http://www.tubeampdoctor.com/catalog.php?product_search=6SN7GTB&l...

The Heyboer HTS-9565 OT is THE OT for a 6SN7GTB plexi build. I had no problems sourcing it directly from Heyboer. There are plenty of 6SN7GTB around at reasonable prices

http://www.thetubestore.com/Tubes/6SN7-Tube-Types

The Heyboer choke for the K-50 (guess it's the same for K60) is hts-7750-1 10H/200ma

P.

I've used that mod in all my guitars for twenty years.... until I started using an Express. Since there is no tone loss when you dial guitar volume down using an Express, the treble bleed circuit gets in the way by making clean tones too trebly. To the point that I made the treble bleed circuit in m...

We usually describe as "howling" the noise you get when the output transformer's secondaries are reversed. I would try exchanging the blue and brown leads from your OT.

P.

I got this mail from Heyboer when I built mine cheers P. HTS-8593 Primary # 1 Common Black 100 Volts Black/White 120 Volts White Primary # 2 Common Purple 100 Volts Purple/White 120 Volts Blue 375 - 0 - 75 - 375 Volts Red - Red/Yellow - Red/Blue - Red 5 Volt Yellows 6.3 Volts CT Green - Green/Yellow...

Hammond 1750A worked fine for me

Pablo

I use the same grounding scheme as Roberto and Gaz. See the attached schematic for my Express. All groundings are labeled with the local grounding star to which they belong (s1,s2...s5). In this case, heaters are elevated. If they were not, they would be grounded to s1, the PT's grounding. Pablo

I had a similar problem last month. The noise would go when the amp was out of the wooden cab. It turned out to be a faulty i IEC power cord. It only made good contact when the amp was upside down (when out of the cab).

P.

Hi there. This is my friend Marco Ciargo trying out my Express. Settings are gain at 2 PM, the rest at noon, including VVR. He is plugged in the "hot" input (parallel triodes) and using an old Gibson SG. He switches from full on bridge to neck at maybe 4 at 0:50. Recorded with my shitty Zoom H2 with...