Carmen Ghia

[Beach247]

Built this one a while ago and just added a PPIMV. Named it after the wife in an attempt at forgiveness for build costs

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[mungus]

That looks great - really professional job. My own skills end at soldering - but if 6 inch nails are the solution, I'm yer man.

Did you follow the schematic posted here?

 

[Beach247]

That looks great - really professional job. My own skills end at soldering - but if 6 inch nails are the solution, I'm yer man.

Did you follow the schematic posted here?

Yep, thats the one. There was also a layout that showed the cathode bias resistor as a 130R. I tried both and 150R is the correct value. Runs too hot with the 130.

 

[Keala]

Where did you get your faceplate made? Looks sweet!

 

[Beach247]

Where did you get your faceplate made? Looks sweet!

amplates.com

I sent him the artwork and I had the faceplate a week later. A little pricey, but worth it.

 

[robrob]

Very nice build, congrats.

 

[Platefire]

Great Job! Where did you get your schematic at to build it?? I built one a couple of years ago and the only schematic I could find was one that someone reverse engineered from looking at an actual circuit(pix attached). That's the one I used. Couldn't find anything else! Platefire

 

[Beach247]

Great Job! Where did you get your schematic at to build it?? I built one a couple of years ago and the only schematic I could find was one that someone reverse engineered from looking at an actual circuit(pix attached). That's the one I used. Couldn't find anything else! Platefire

Thats the one

 

[Charlie Bernstein]

Yep, thats the one. There was also a layout that showed the cathode bias resistor as a 130R. I tried both and 150R is the correct value. Runs too hot with the 130.

Gorgeous build! Much prettier than mine is going to be. (I do want to finger-join it, though.)

I've been puzzling over that Phoenix diagram and have some questions:

- Which resistor (they're numbered) should be 150R? I don't see "130R" anywhere.
- What's that "C" on the diagram down between the R14 and R15 resistors?
- Where's R28? I see R27 and R29 but no R28.
- What do dotted lines mean?
- Were there any other mistakes?
- Are there other decent layouts available, online or elsewhere?

Obviously, this is my first build. Plenty more questions where this one came from!

Thanks -

cb

 

[Wally]

Charlie, the bias resistor..150 versus 130 ohms....is R12. It is the cathode resistor that sets the bias for the power tubes.
Beach427, that is a beautiful job there! About the cathode bias resistor, You said 130ohms there biased the amp too hot. How hot is too hot?

 

[Charlie Bernstein]

Charlie, the bias resistor..150 versus 130 ohms....is R12. It is the cathode resistor that sets the bias for the power tubes....

Thanks, Wally!

My dad was an artist. Glad he didn't live to see me color by numbers!

 

[Wally]

Charlie....self taught here. Ime, if you are going to build or repair these things; using the layout or the living circuit board with reference to the schematic is a way to learn
to read those schematics and thereby understand how the electrons move around in the circuit. Learning to understand the tube pin outs is necessary. If you don't understand the tubes' pin outs, then the schematic doesn't make as much sense. This site is a good place to study tubes...pin outs, specs, etc.
Search 'Duncan tube data'. Ime, drawing the tube pin outs out by hand helps...but a printout will do. Have it at hand while studying the schematic and the layout. Analogy to your Dad's art......you have to understand the colors and how they interact in order to achieve much.

 

[Charlie Bernstein]

Will do. I also found an online pin guide that shows what pins on different tubes are for. Thanks!

 

[raito]

Built this one a while ago and just added a PPIMV. Named it after the wife in an attempt at forgiveness for build costs

You're wife is named Murray?

 

[Tidepoolbay]

Nice work!