The Amp Garage

It does sound nice with a 335! I have a ‘65 335 and a ‘55 Jr. Both sounded fantastic! The pre PI gain attenuation really is huge. I messed around with dumping gain in a couple of other places, but that is really the money spot. I also knocked the cathode bypass down to 5uF on the first two stages. A...

https://vimeo.com/949753461?share=copy
https://vimeo.com/949753461?share=copy

I thought I knew how to post video. DOn't have time to research right now, but will post them back up as soon as I do

Hey everyone. Well, i'm disappointed that I didn't win 'Tolexer of the year' but they said to keep on practicing. All kidding aside, this is the first time I've built and designed a whole thing. I tend to care more about sound than looks, but since this was for my kid, I tried to make it look as coo...

I have to fly out of town again this weekend. I will try to take some photos and post a clip or two, once I get everything buttoned up

I wanted to update everyone with the amp build. Once I get my faceplate back I will post some pics. This is the first project where I did everything. Made the cab. Tolexed it, etc. I'm really happy with the results. For the pre PI gain, after playing with the 250k pot for a while, I settled on 82k. ...

Awesome. In that case I will just change the tail, and it wouldn’t be an amp build for me without squealing leads on initial power up. Seems that no matter how closely I follow the the diagram, I always have to reverse the primary leads

This comes up all the time. You can keep the same feedback resistor on the same tap, and put the speaker on whichever one it matches, or, move the feedback resistor to the tap the speaker is on, and adjust it's value by (New Spkr Tap/Old Spkr Tap)^0.5 Given the secondary hookup for the 1620, you wi...

I bit on Ian's suggestion to try the Hammond OT, so waiting for that to arrive. The multiple taps open up some options for me, and I'm probably going to use a Celestion vintage 30 that I have. I love that amp for mid level amps like this. Anyway, it's a 16 ohm speaker. If I want to keep the feedback...

My point with that is that if I was building it for myself, having quite a bit of recording experience, I would keep it “as is” and use it in the studio, where I am often looking for unusual and unique sounds. For my kid, who will have one amp for all his use, I want the widest usage and most practi...

Hello again -- Hello -- Wondering what type of tube is presently installed in the PI position? Either V4 or V6 depending on reference schematic. Best .. Ian Ian! My dear old friend Ian McClagan would say "Us Ian's gotta stick together!" so passing that down the line in his honor. I have 2 old stock...

So Just to clarify where you ended up, using 190K in place of the 330K on your original schematic addressed the issue? I haven't actually put a 190k in yet, but that is the value that gets my build right in the lane of where the voltages should be. It also maximizes the design to my ears. I messed ...

Hello again -- Hello -- Wondering what type of tube is presently installed in the PI position? Either V4 or V6 depending on reference schematic. Best .. Ian Ian! My dear old friend Ian McClagan would say "Us Ian's gotta stick together!" so passing that down the line in his honor. I have 2 old stock...

Glad the amp is working how you wanted it to! Also really cool to hear the OT worked out -- the concept kind of reminds me of JTM45 OTs with high Z ratios. I'm still curious as to why the 47k and 330k to ground weren't enough to tame the input to the PI The 47k and 330k to ground aren't truly in pa...

With the pot at 190k, the voltages fell much closer in line with Rob's expected voltages. I went out to the studio, plugged it into a nice 8 ohm speaker and the amp sounded amazing! I was able to use the volume knob all the way to the top of its range, and at the top it had that warm, loose feel of ...