I just looked at the gutshot picture. 1st time I’ve seen the inside of a Songwriter 30. Looks alot like a modified 18 watt? Add 2 EL84’s
Parallel 12ax7- tone/bass-volume w/dual brightness
Treble/ cut control
I bet they really sound good
Songwriter 30 dna
Moderators: pompeiisneaks, Colossal
-
wpaulvogel
- Posts: 448
- Joined: Wed Jan 23, 2019 3:11 am
- Location: Leesburg Georgia
- Contact:
Re: Songwriter 30 dna
They sound great.
The topology is:
Parallel triode preamp -> variable coupling cap "bass" control -> treble peaker -> Volume -> bright switch -> Vox PI -> Cut "treble" control -> 4xEL84 running lowish voltages. Biased at 50R/220uF, like an AC30.
The topology is:
Parallel triode preamp -> variable coupling cap "bass" control -> treble peaker -> Volume -> bright switch -> Vox PI -> Cut "treble" control -> 4xEL84 running lowish voltages. Biased at 50R/220uF, like an AC30.
-
wpaulvogel
- Posts: 448
- Joined: Wed Jan 23, 2019 3:11 am
- Location: Leesburg Georgia
- Contact:
Re: Songwriter 30 dna
I built an amp 2 years ago with so much similarities and didn’t even know. It’s running ECL82/6F3P and 6N2P. 1 parallel to tone to volume to 1/2 6N2P to long tailed pair to cut control. Using the triodes in the ecl for the phase inverter to a Hammond 18 watt Marshall output transformer. 300 volts on the power plates. Zeners to cut the screen to 190 volts. Solid state rectifier. Fixed bias
It sings. 9 watts rms. 16ish ttr. I thought it was original. Named it WCV (my wife’s initials)
It sings. 9 watts rms. 16ish ttr. I thought it was original. Named it WCV (my wife’s initials)
You do not have the required permissions to view the files attached to this post.
-
Stevem
- Posts: 5144
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Songwriter 30 dna
Sounds like a 1965 to 1967 Univox U45 model but with a tone stack.
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Re: Songwriter 30 dna
Oh yes, I forgot that the Songwriter is SS rectified as well, but cathode bias.wpaulvogel wrote: ↑Fri Aug 09, 2019 11:58 pm I built an amp 2 years ago with so much similarities and didn’t even know. Solid state rectifier. Fixed bias.