tube

Hello, and thank you to anyone willing to give feedback. I’m working on my first amp build, using Dave from Boothill Amps 5f1 kit. I really enjoyed building the cabinet while awaiting the parts and have dug into putting the chassis together. I’ve only worked limitedly on PCBs with soldering and...

Hi all! I pulled a banged up Blues Junior out of trash heap a while back. It's got a nice cab, speaker, and the chassis and transformers are good. The boards are all gone. So! What should we build? I think I may get the kids involved to help as a learning experience, but obviously I'd like to...

Hey everyone, I've read a ton of posts on this topic, but I wanted to ask something more tailored to my situation. I’m finally looking to get a tube amp for apartment-level playing. From what I understand, I should be aiming for something between 1 and 5 watts, maybe up to 10 watts max. Some...

Hello, Picked this old Teisco Audition Combo amp from a friend a few years back. Did some recent Googling but I can't find any of the resources I saw online several years back that match what I have. I can't even figure out how to disassemble it safely to peek inside. Exposed screws are only on...

It seems like they've stabilized at around double the price that they were in 2021. Is there any chance the prices will ever come down? Or do I need to suck it up and accept that any amp retube will cost hundreds of dollars, for the rest of my life?

I nabbed an Orange OR15 recently, used. I have always loved that "Orange" overdrive, the looks, etc. and wanted to get into it, and finally found a good price on a used OR15 that I could justify. I've had a 2x12" open cab sitting around doing nothing, waiting for an SE 6L6 build... has a...

Not trying to get too ahead of myself here. I recently created a method to “tubify” the preamp of a Roland Jazz Chorus. I used a one of a kind preamp guitar pedal, operating at true amp voltage, equipped with three 12ax7’s, the Effectrode Tube Drive. The important distinction is that without...

Hey everyone! I'm looking for some experienced members to help me sniff out what is going on with this amp, any help would be greatly appreciated, however I have tried a lot of different things already so please read the long story! The long story not so short. I got this amp on Ebay for a...

Hi, i've bought a probe to measure the control screen grid voltage (the bias) for my EL34 tubes, in order to measure their TC. The probe kit i've bought was sold with 1 ohm/0,6w resistor and was sold as a idle current probe. How to wire it for this purpose ? spec sheet

I bought this tube amp at an auction because it was cheap. Like 1$ cheap! I have no clue exactly what it is (or was) and that makes working on it a little confusing for my small brain. It doesn't have any 1/4 inch connectors, nor anything that says "Input" or "output". Any Help identifying this...

I've been building and moding amps for a few years now, but this was the first time where I really made a circuit my own, and created my own layout. I started with a basic AB7563 Blackface circuit as cut down to a single channel by Rob Robbinette. I started with his RR763 dual 6L6 design. From...

I have a 20-watt combo Marshall Origin. Little over a year old. Have not had any issues with it. Only play at home and only a couple times per week with this particular amp. Generally, for 20-30 minutes at a time at mid-power and with volume 1-2. Has not left my basement since I got it new...

I've only had the amp (Delta King 12) about a month. It's only made this noise once before and it was very brief. When it happened today, though, it lasted long enough for me to record a quick video of it. The master volume is all the way down so I'm pretty sure it's not coming through the...

Hi, I'm new to this forum. I build this little amp with the power output in the milliwatt range and I would love you opinion. Is based in 3 projects. The Alembic Preamp, The Real McTube Power Supply, and an idea from a guy named Kris Slyka where he use a Chinese pentode (6j1) as output...

I'm pretty self-taught about electronics, and I try to get conceptual understandings of how things work. I want to understand better what output impedance means, I feel like I have a somewhat conceptual understanding, but it's not fully clear. There's two different ways I think of it: 1. In the...

I recently purchased three 60's Bandmasters from a local vintage guitar shop. Two AB763, one AA763. I've been in the process of doing some of @robrob 's wonderful mods to each of them along with a Quad Reverb I bought. All are done except one. I've opened up the last Bandmaster (the AA763) and...

I picked one of these up for almost nothing at a garage sale with the little 8 inch cab that goes with it. I am not impressed with the cab at all, however, I plugged it into a 2x12 and it has become one of my favorites. I started playing with tube change and settled on a vintage RCA 12av7...

Hi! So I chose to start a new thread rather than reviving the old ones. I just replaced the PT that was smoked. The old PT was the stock model for EU market with 230VAC from the wall. Model number 013917. The replacement transformer I got is the drop in from Hammond, model 290YEX. The...

I just purchased a Player Telecaster a few weeks ago. I had been playing it through my Rumble 25 amp which sounded good. I then decided to get an electric guitar amp, a Champion 40. It is really nice. I have been taking a few days to dial in the sound I wanted on the two channels. For twenty...

Hello Tube experts the original tubes in my recently acquired Fender 4x6L6 from the late 70’s are still Running great. But I want to save them for if and when I plan to either give away or put in storage (not happening soon) Tube set from TAD will cost me around 300,- I have a large stash of...

I restored a vintage SFTR earlier this year. I've really been very happy with it. On a rare occasion, however, it just randomly starts making a really loud buzzing, about as loud as the guitar sound. This comes on suddenly sometimes after I've been playing for 45 min or so, not gradually. The...

I have heard that this amp can get icepickey but to me it just sound muddy. Any help?

The screws look like they are self-tapping into the chassis on my 65PRRI (see Avatar), but before I remove them would be nice to know there won't be locking nuts falling inside the chassis as I remove the screws. Why remove? Need to inspect why a new Gold Lion 12AX7 Gold Pin will not align...

I have recently bought a Fender Hot Rod Deluxe II. When I got it sounded a little muddy, and the first preamp tube seemed to be microphonic, so I bought a replacement 12ax7. Except that a couple of days into playing, and it seems that this tube has now also gone microphonic. It is in the v1...

So I have a peavey 6505 that I'm pretty sure has bad preamp tube sockets. When I first bought, I was stupid and didnt notice there was a strange noise. Its sounds like rumbling thunder thats continuous and got louder when I turned up the volume which lead me to believe it's the preamp. It didnt...