Tube Amp Archive

I bought a Robert Hinson Express and I LOVE it... I think that fulfilled my Marshally, higher gain rock craving. But now I'm back to longing for an ac30. It seems like, from what I'm reading, that the Rocket is an ac30 tweaked to Ken's liking with some added gain. I've heard mixed ideas about Nik's ...

I actually have a Maz 38, which I believe is similar to the 36 watt. I really don't care for ef86's because it's so hard to find a good one. I had a Dr. Z Stang Ray and had really awful experiences with the 86's so I'm hoping to stay away from them. (BTW when the tube was good, the ray was great. Be...

I have to stop listening to the TW clips on youtube and ceriatone. I keep changing my mind. The rocket and liverpull both sound rockin' too. I'm basically looking for a voxy-marshall bastard child that could cover modern country and classic rock (basically the same thing these days). But volume is a...

I'm thinking about (ok, raising the money) to get an expression kit from Nik. I'm off the road for a while and need a project to keep my idle hands from the devils work. But I can't see why I would pay nearly double to get their tranny's shipped over here (Nashville, TN). So, I'm wondering what tran...

In an effort to learn a little more about this subject I emailed Nik and he said "Well, the PT doesnt have 5V tap for the tube rectifier, actually. If you can install a 5V-0 tranny inside, then you can do this." What did he mean by installing a 5v-0 tranny? Meaning in addition to the current tranny?...

When I first built my 5e3 I had all the grounds running to an un-grounded terminal strip and it was a lot like the boxes you guys are describing. :lol: Everytime I touched it I got a jolt. Had a 68 bandmaster reverb that blew the bias pot and was doing the same thing a few years back. Electricity an...

Looks like I need a different meter. Mine just blinks OL when I touch pin 3. I'll have to hit up my dad tomorrow when I head down to my hometown. I'm either getting used to the way this amp sounds or I'm bonding with it. I don't know. I put in some sovtek 6l6's that were matched and biased around 35...

Which pin do I measure the plate voltages from on the power tubes?

It's an ax7. Actually.... jj ecc 83s but that's the same thing right? I hooked up the kleinulaton and v1 went up... here's the readings v1, pin1~200.8 v1, pin6~205.2 v2, pin1~196 v2, pin6~204.2 v3, pin1~251 v3, pin3~41.7 v3, pin6~244.7 v3, pin8~41.7 pin 3 and 8 of v3 are connected. Would an at7 be b...

I think so. I measured from pin 1 of each tube to the chassis.

I took apart my ceriatone HRM BM today (finally) to sheck the plates voltages of v1,2 &3... v1 is good. v2 is about 5 low and v3 is about 40 low. How do I go about getting those up? FWIW v1~200 v2~195 v3~249. The OD kind of sounds like fuzz more than OD to me. Could this have something to do with it...

Cool, I haven't followed up on this thread in a few days because of my sag quest... Different post. Does anyone have a BOM for the princeton ODS? or similar lower wattage OTS? I'm thinking I'd like to build a small amp I could throw a mic in front of that won't take up much space in my car. I dig th...

I'm not really worried about what a dumble is or isn't. I'm just looking to make this amp that sounds great sound amazing (to my humble opinionated ears). I really dig the cleans. I AB'd it with my twin and it blew the twin away. My gripe is there's not much sag/bloom happening on the OD channel (I ...

This might be a ittle off topic, but what would happen if I changed the PT? To something lighter like a 25 or 30w. Would that drop the B+ to where I could install a tube rectifier? I'm sure that would drop the output as well, but would I be hurting anything by doing that? How would the tone be effec...

I'm fairly certain. I know it's not sustain. Although I love sustain I'm looking for the slightly softened attack and nice bloom. Seems like that's more on the compression side of things. I wish I had more education to speak in better technical terms. All I can really do is compare it with other bra...