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  1. Quality is down in many areas, and it won't get...

    Quality is down in many areas, and it won't get better I fear.

    I remember several years back buying new aluminum rims from my classic car. The center cap screws they sent with the rims were the...
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    You Are 100% Correct. Seeing how I'm not a kid...

    You Are 100% Correct.

    Seeing how I'm not a kid anymore, when I got back into playing and buying equipment, I spotted those cheap MG speakers from a mile away. I've seen a lot 100watt Marshalls...
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    I don't think you can tell precisely just by...

    I don't think you can tell precisely just by looking at it as others have mentioned, but you could make a fair guess based on the visual size of the magnet and voice coil, as Chuck H indicated. I...
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    Might I suggest using this ? The ST-2 With an EQ...

    Might I suggest using this ? The ST-2 With an EQ in front of it is my "Amp Model" of choice, and it's amazingly inexpensive, and up to around 12 O'clock sounds a lot like a vintage Marshall Plexi....
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    Thanks for all the help so far. My laziness has...

    Thanks for all the help so far. My laziness has passed, and I will remove the old transformer connections when I test the new one, and now I know a bit more about the role of inductance being lowered...
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    Thanks Helmholtz, I have to read up on...

    Thanks Helmholtz, I have to read up on transformers a bit more and understand inductance. Now in the paralleling of the two transformers, only one will actually be connected to the speakers at the...
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    Test New Output Transformer

    Just got a spare 20 watt output transformer today that I think might help an amp of mine (A Gretsch 6162) to sound a bit better (more low end). The amp is running two 6973 tubes at 392vdc plate and...
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    I love to modify and "Hotrod" my amps to suit my...

    I love to modify and "Hotrod" my amps to suit my tastes, but I also spend a fair amount of time up front with a new amp using a parametric or graphic EQ at the very end of my rig chain - (just before...
  9. Good Quote and thoughts. Begin from the...

    Good Quote and thoughts. Begin from the beginning.

    I've had enough cases when there was no sound in my rig, and first thing to check is the amp plugged in, and the volume turned up on the guitar....
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    I may be out of line here, but maybe you can try...

    I may be out of line here, but maybe you can try and service it yourself ?

    That's how I got started just a few short years ago. Techs in my area are 'OK' but some made suggestions I thought were...
  11. You are 100% correct Leo_Gnardo, ignoring...

    You are 100% correct Leo_Gnardo, ignoring filament current a common mistake for newbie tube rollers.

    You have to be concerned with Filament current. It's important to the life of your transformer,...
  12. Ok, got the Russian 6n6c tubes today. All was...

    Ok, got the Russian 6n6c tubes today. All was looking good, 3 tubes for a small $23 delivered, and I do believe they are 100% new and never used, as they were in the original boxes sealed with thick...
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    True statements Mr. JM Fahey, shorts come in many...

    True statements Mr. JM Fahey, shorts come in many shapes and sizes, and some are found outside the normal suspects including tubes, caps, transformers, etc...

    I had a cloth covered wire for the...
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    Fantastic ! He's a Good One !!!

    Fantastic ! He's a Good One !!!
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    Series Resistor or Voltage Divider ?

    As I have no formal training in electronics, I still have some gaps in understanding the basics, and I greatly appreciate any comments as they would help to solve my riddles !

    Questions :


    ...
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    I mostly agree with you. Even buying my vintage...

    I mostly agree with you. Even buying my vintage 1986 JCM 800 was a compromise, and I bought it for the master volume, but the truth is I don't like the way that amp sounds with just preamp distortion...
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    Yes indeed ! Here's my story in brief, had the...

    Yes indeed !

    Here's my story in brief, had the luxury of being able to play some great amps professionally (out in clubs and small venues) when I was young (Short list : Ampeg, Magnatone,...
  18. Fantastic ! Thank You !

    Fantastic ! Thank You !
  19. Yeah, I kinda felt like I was lucky to be in the...

    Yeah, I kinda felt like I was lucky to be in the safe zone for voltage, and doubted the potential for such a wide claimed range from 3vdc to 40vdc, but I am starting with a modest 14.4vdc and because...
  20. Small DC Stepdown Board, Never gets hot ?

    Small DC to DC voltage dropping board like this : http://qqtrading.com.my/dc-dc-step-down-adjustable-voltage-3a-lm2596-buck-converter

    I am using one to drop the voltage for my pedal board battery...
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    I don't fix amps for anyone but myself (so far)...

    I don't fix amps for anyone but myself (so far) but if I did, I would have cut the guy off a bit sooner, and told him (very nicely in writing) if you want the amp fixed leave it with me, and there...
  22. These types of switches are a bit noisy (as in...

    These types of switches are a bit noisy (as in pops) and weird when they get old. I have two of them, and both "leak" some signal across even in the standby mode.

    I've become super good at...
  23. Thanks Helmholtz, I recognized that as a problem...

    Thanks Helmholtz, I recognized that as a problem early on, and tried to install a 470k input resistor to ground early on, but picked up a ton of hum, and this amp is super quite in it's stock form. I...
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    I also have three of those amps, the older...

    I also have three of those amps, the older version with no tone control, the ancient early 1940's version, and one other with a tone control from 1955, but that last one it uses a 6SQ7 tube and...
  25. Please Help me to Understand this Phase Inverter.

    Sorry, this may be a repeat question, but I will try to be more specific in my questions this time around, as I am still lost.

    54357


    What is the function of the .005uf cap just after the...
  26. Thanks ! Good idea, I've seen those tubes and...

    Thanks ! Good idea, I've seen those tubes and wondered. I will buy a couple and find out. This could be really good, as the amp already has a slightly bigger 20 watt output transformer and I've...
  27. Junk is Junk. I've only been at electronics...

    Junk is Junk.

    I've only been at electronics for a couple of years, but I have a lot of experience using cheap parts for auto rebuilds, and you get what you pay for (cheap part and cheap tools =...
  28. Yes, I think that's my problem, assuming...

    Yes, I think that's my problem, assuming automatic red plating past 12w or so.

    But still I've seen this now in the coin-based tubes, they all handle high watts. All my other RCA, Sylvania, etc......
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