Show us your flea-watts amps!

[tubelectron]

Thanks @Mr Boochie !

I first thought at the first glance that your Champion 600 was a RI, but nope : it's a well preserved original one...

T

 

[Mr Boochie]

Thanks @Mr Boochie !

I first thought at the first glance that your Champion 600 was a RI, but nope : it's a well preserved original one...

T

1949 issue. Back in Fender's Woody days.

 

[drteming]

Does the copper tape help with heater noise?

I initially only put the copper tape on the left channel where the B+ wire was crossing the heater wires, albeit at close to a right angle. I then put the copper tape on the right side to keep it against the chassis. Not sure if it helped, but this amp is the quietest amp I'd ever built. If I put my ear up against the woofer, I can barely make out a hum.

Neat amp. Would love to see a schem. if you have one.

jeff

I've been playing with the negative feedback. With the 3k3 resistor, the amount was about -2.5 dB, and it sounded really good. When I increased the negative feedback, I couldn't reliably tell any difference. With -2.5 dB of feedback, the amp was clipping when the volume was maxed out as I have a pretty hot source. I increased the negative feedback to -6.5 dB by swapping in a 1k resistor, and that took care of the clipping. The THD+N only dropped from 1.89% down to 1.47%, can't tell the difference.

 

[vinylkid58]

Thanks for posting that up @drteming.

jeff

 

[jobrewer1983]

I think this little guy is 8-10 watts ^^

 

[tubelectron]

Here's again your "Vintage-SteamPunk" amp @jobrewer1983...

T

 

[Lavane]

View attachment 3225967View attachment 3225968

I think this little guy is 8-10 watts ^^

Nice glow!

 

[jobrewer1983]

Here's again your "Vintage-SteamPunk" amp @jobrewer1983...

T

I have 3 of those in various stages of restoration. They are pilot amps, I run them with 12-15” coaxial or FR drivers.



This “little” Phillips HF-10 is 10 watts



Recapped and upgraded binding posts.

 

[jobrewer1983]

Nice glow!

I love this amp

 

[Mr Boochie]

The 6V6GTY is one of my favorite tubes!

 

[Lavane]

The 6V6GTY is one of my favorite tubes!

Are they all like that? Are they just gassy?

 

[Mr Boochie]

Are they all like that? Are they just gassy?

Lazy purple or blue haze from output tubes is okay (ask Jimi ).

It's contaminated in the manufacturing process, burning off.

 

[Lavane]

Lazy purple or blue haze from output tubes is okay (ask Jimi ).

It's contaminated in the manufacturing process, burning off.

My KT-88's and 6CA7's have aome glow, but none of the 6v6's I've never had glowed like that though.

 

[Mr Boochie]

My KT-88's and 6CA7's have aome glow, but none of the 6v6's I've never had glowed like that though.

Are those GE? I have not seen mil-spec 6V6GT tubes glow like that. But, as long as they bias well and are not noisy, you are good to go.

I have used GE 6V6GTY (both US and Canadian-made) in many amps. They are great tubes.

 

[Lavane]

Are those GE? I have not seen mil-spec 6V6GT tubes glow like that. But, as long as they bias well and are not noisy, you are good to go.

I have used GE 6V6GTY (both US and Canadian-made) in many amps. They are great tubes.

View attachment 3226191


View attachment 3226190

My K88's and 6CA7's are new manufacrure. The bag of 6V6's I have are all various brands I've come across. Some from a couple Magnavox 175 amps that had mixed brands in them. I just assumed those 6V6's in his picture were 6V6's.

 

[jobrewer1983]

The 6V6GTY is one of my favorite tubes!

Yes mine too they produce some amazing sound.

 

[jobrewer1983]

Are they all like that? Are they just gassy?

Lots to factor in on the purple/blue glow. New caps, NOS tubes, etc. it’s just a healthy amp. I have other 6v6 tubes I roll through the amp that don’t have the blue glow, some do and some don’t.

For example this is the same model amp but has different caps and 6v6GTA tubes instead of the GTY.





As you can see the blue isn’t as vibrant.

 

[Mr Boochie]

Lots to factor in on the purple/blue glow. New caps, NOS tubes, etc. it’s just a healthy amp. I have other 6v6 tubes I roll through the amp that don’t have the blue glow, some do and some don’t.

For example this is the same model amp but has different caps and 6v6GTA tubes instead of the GTY.

View attachment 3226326

View attachment 3226327

As you can see the blue isn’t as vibrant.

Yes. The blue haze is specific to the tube, although, in my experience, almost all Chinese-made output tubes of the 1980s-90s had this glow.

 

[jobrewer1983]

Yes. The blue haze is specific to the tube, although, in my experience, almost all Chinese-made output tubes of the 1980s-90s had this glow.

Well I can tell you they are not china made tubes

I’m cool with the blue, it’s the red I dislike lol

 

[jobrewer1983]

Cleaning up this little tiny Monarch SA-614 right now, claims to be 14wpc. Little guy is cute as all get out