BTW, imho 5 Fender knobs look way better on this little amp than the bit smallish originals... just personal preference
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Show posts MenuQuote from: galaxiex on November 05, 2017, 07:30:42 PM
Interesting layout compared to the others.
QuoteCan you do a overall shot that shows the whole chassis.
Quote from: galaxiex on November 02, 2017, 07:34:00 PM
Just curious to see what it sold for.
Quote from: galaxiex on November 01, 2017, 06:48:49 PMQuoteJust curious, how 'wet' can the reverb get at maximum?
It can get pretty wet, but it doesn't sound good.
I'm sure this is due to the limitation of the small tank.
It also doesn't help that there is only 1 spring.
QuoteI played with part values in mine and got a "fair" sounding reverb,
but it will never be a Fender Twin.
If you "over do it" with driving the tank too hard,
or increasing the gain on the recovery side, bad noises happen.
Screeching/feedback/metallic "clank" sound, etc.
Changing some cap values and possibly adding some caps in strategic places can smooth out the sound.
Limiting the frequency range that is fed to the tank helps.
QuoteThere are other small multi spring tanks around that would fit the chassis.
I never tried any, and there may be impedance matching problems with some of them.
No guarantees they will sound any better than the existing tank.
Quote from: galaxiex on November 01, 2017, 06:51:23 PM
I don't recall the layout of the other amp.
Easy enough for me to open it up and get some pics.
I'll do that later.
Cheers!
Quote from: galaxiex on November 01, 2017, 12:58:53 PM
Yup, they are kinda cool little amps. Actually sound pretty good for what they are.
QuoteBe aware there are at least 2 different versions of this amp,
both have the same name (National) and model number (GA920P) but different circuit boards/schematics.
I have one of each but not posted anything about the "other one" yet.
Quote from: clintrubber on November 01, 2017, 09:05:23 AM
Was wondering, any info on the reverb tank they used ? Input- & output-impedances ?