Merry Christmas! Always prudent to group the grounds as you did. Ground the filters with their respective stage’s cathode grounds. Killer job on sniffing out that reverb hum.
And so you send another beautiful vintage BF Fender confidently into the future- I’d put money on it making to its 100th birthday in 2065 just fine.. Really good recording of the amp, very open and full sounding, mic and its placement captured a good blend of the amp and the room..
I always like to see these hum repair videos! I've had so many amplifiers with the same issue over the years or a similar type of issue... Watching a good Tech go over and fix these problems is very satisfying!
You are so knowledgeable. I always enjoy your Informative videos. If ever I need work on my 65 Princeton (my baby) I will contact you to have it "Lyleized" & Upgraded. Happy Holidays from NYC
Here in Oz , our wall voltage was 230 years ago , but nowadays in often high 240s . So for my Matchless collection I use a pair of 5V4 in the two socket EL84 stuff , and a 5U4 in the single socket EL34 amps . The BadCats are imported with 250V transformers , as the importer knows his product . Everything has been happy for the intervention . The Matchless are much cooler to touch .
Nice mod to the reverb B+. That unused power supply node suddenly makes sense. In my own PR-type builds, I just use three 22uf filter caps, eliminating the unused node. Plenty quiet that way - no audible hum. Great video, thanks!
Your amp repairs sound so good. I’m on a tone quest with my original Supros 6424. I recently restored them back to stock. I own 3, one has a tube rectifier the others have diodes. Hum has always been something I’d like to get rid of.
I can highly recommend watching Lyle's video on ground schemes. It's exemplified with various amps and then put into practice on a Marshall. It should be enough to get improvements.
I watched your Marshall ground scheme video carefully over the past days and it was nice to see that theory in action in another amp in a way that was easily understood after watching the video. Great stuff as always.
@@PsionicAudiothat was the first song I learned on guitar and sounded so sweet. I haven't played it in decades. Now I miss my BF Princeton. This sounds awesome Lyle!
Hi Lyle, would you consider using a 5V4 rectifier for a smaller amp like this as it has a lower voltage drop than the 5U4 and also draws only 2A of filament current (like the GZ34) and also is indirectly heated for a more gradual warmup? Just wondering. 🤓👍🏽 I'm a big fan of the 5V4 these days for smaller amps.
Thanks. It was a foot of 18AWG, so you wouldn’t hear any difference with 10AWG. Given the short distance and low wattage I could have used 22AWG with no sonic change. But the twisted 18AWG has better mechanical strength.
I'm not a paying customer but I will ask you this anyway. I bought a new Jtm20h from ????? water. I love the amp. I patched the lower high channel or the lower channel 1 to the top 2 or normal channel I started getting somewhat noticeable noise like a bad ground. I will check another outlet I noticed the patch cable ( at least four feet long, had the words Marshall and pvc written on it. There might be other letters or words if I unfolded the cord. Dont' know. I never had an amplifier with a need to patch two channels before. I wondered if the materials made a difference . Ok having said that I did notice the hiss or noise wasn't as apparent when I was playing . Not maxed out on the pots. I was playing through a not well used 2x12 bass breaker cabinet (16 ohm) plugged into the 16 ohm jack on the back of the head using a speaker cable. Ok, I gave you what I had. I figure your busy but if you could, an idea or a few might be helpful. Thank you,
@@PsionicAudio A lot of people worry over rectifier heater current . There's lots of leeway , especially as the actual heater wattage is minimal anyway.
Amazing as always Lyle. Great to hear my little 65 again, and on my 40th birthday!
Happy birthday!
Happy Birthday! Nice amp!
Merry Christmas! Always prudent to group the grounds as you did. Ground the filters with their respective stage’s cathode grounds. Killer job on sniffing out that reverb hum.
And so you send another beautiful vintage BF Fender confidently into the future- I’d put money on it making to its 100th birthday in 2065 just fine..
Really good recording of the amp, very open and full sounding, mic and its placement captured a good blend of the amp and the room..
So nice to hear reverb at a reasonable level (as opposed to a certain West Coast retail establishment whose current demo guy cranks it.)
Lovely!
I always like to see these hum repair videos! I've had so many amplifiers with the same issue over the years or a similar type of issue... Watching a good Tech go over and fix these problems is very satisfying!
amazing sounding Amp very clean and Beautiful ,Very nice restoration Lyle and this is why your in such demand
Wow, killer sound!!
You are so knowledgeable. I always enjoy your Informative videos. If ever I need work on my 65 Princeton (my baby) I will contact you to have it "Lyleized" & Upgraded. Happy Holidays from NYC
Another great repair/restoration, Thanks for posting and best wishes for a happy and peaceful Christmas.
Here in Oz , our wall voltage was 230 years ago , but nowadays in often high 240s . So for my Matchless collection I use a pair of 5V4 in the two socket EL84 stuff , and a 5U4 in the single socket EL34 amps . The BadCats are imported with 250V transformers , as the importer knows his product . Everything has been happy for the intervention . The Matchless are much cooler to touch .
Nice mod to the reverb B+. That unused power supply node suddenly makes sense. In my own PR-type builds, I just use three 22uf filter caps, eliminating the unused node. Plenty quiet that way - no audible hum. Great video, thanks!
Your amp repairs sound so good. I’m on a tone quest with my original Supros 6424. I recently restored them back to stock. I own 3, one has a tube rectifier the others have diodes. Hum has always been something I’d like to get rid of.
Thanks. Supros have awful ground schemes - they always hummed.
I can highly recommend watching Lyle's video on ground schemes. It's exemplified with various amps and then put into practice on a Marshall. It should be enough to get improvements.
Beautiful sounding Princeton! Happy Holidays, folks!
Merry Christmas to you and your family Sir.
Happy holidays, Lyle.
Merry Christmas and Happy New Year to you, yours, and everyone else
I watched your Marshall ground scheme video carefully over the past days and it was nice to see that theory in action in another amp in a way that was easily understood after watching the video. Great stuff as always.
Lovely sounding amp Lyle. Seasons greetings to you and your family. Have a great New Year too. 👍👍👍👍👍👍
Nice work Lyle!! That’65 with the R-10 sounds absolutely beautiful!
👍👍Merry Christmas Lyle, again, another great vid
Amp sounds sweet. 🎸✌️🎸
Beautiful sounding amp Lyle! That’s the way it’s supposed to sound!!!!
Sounds great! Thanks for your videos, I've learned a lot. Merry Christmas!
Merry Christmas to you and yours Lyle!!!!!
Sounds Amazing. Beautiful job...per usual. Nice House of The Rising Sun riff.
I found myself playing it, which is odd as I never want to hear it again in my life.
But it’s in my lizard brain…
@@PsionicAudiothat was the first song I learned on guitar and sounded so sweet. I haven't played it in decades. Now I miss my BF Princeton. This sounds awesome Lyle!
@@PsionicAudio Lets hear " don't let me down "
I play that all the time.
It sounds absolutely beautiful.
My ‘65 PR is currently in the shop. I’m going to mention the 5u4 swap to my tech.
Nice!
Hi Lyle, would you consider using a 5V4 rectifier for a smaller amp like this as it has a lower voltage drop than the 5U4 and also draws only 2A of filament current (like the GZ34) and also is indirectly heated for a more gradual warmup? Just wondering. 🤓👍🏽 I'm a big fan of the 5V4 these days for smaller amps.
The amp sounds great! Would a heavier gauge of speaker wire have made a difference in speaker output or tone?
Thanks. It was a foot of 18AWG, so you wouldn’t hear any difference with 10AWG.
Given the short distance and low wattage I could have used 22AWG with no sonic change. But the twisted 18AWG has better mechanical strength.
I'm not a paying customer but I will ask you this anyway. I bought a new Jtm20h from ????? water. I love the amp. I patched the lower high channel or the lower channel 1 to the top 2 or normal channel I started getting somewhat noticeable noise like a bad ground. I will check another outlet I noticed the patch cable ( at least four feet long, had the words Marshall and pvc written on it. There might be other letters or words if I unfolded the cord. Dont' know. I never had an amplifier with a need to patch two channels before. I wondered if the materials made a difference . Ok having said that I did notice the hiss or noise wasn't as apparent when I was playing . Not maxed out on the pots. I was playing through a not well used 2x12 bass breaker cabinet (16 ohm) plugged into the 16 ohm jack on the back of the head using a speaker cable. Ok, I gave you what I had. I figure your busy but if you could, an idea or a few might be helpful. Thank you,
How do you think a G10C would pair with a 15 watt 5F11 Tweed Vibrolux clone vs a Veteran 10"
@psionicaudio. I need to drop by and see you sometime, but don't know your schedule.
Champion
The filament current of the 5U4GB is 3A, thats 1A more than the GZ34
The amps sold with 5U4s had the same power transformer as the amps sold with 5AR4s. Not an issue.
@@PsionicAudio A lot of people worry over rectifier heater current . There's lots of leeway , especially as the actual heater wattage is minimal anyway.
But how’s the bathroom coming along?
Also, Merry Christmas!
Wow very quiet
Go Lyle Go.....go
Shoutout to the K-Line Springfield! Hopefully those nefarious purposes are you keeping it for a good long while. @k-liineguitars
Happy holidays, Lyle.