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Topics - FrugalGuitarist

#1
Amplifier Discussion / Vox Pathfinder 15r Mods...
May 24, 2010, 03:43:21 PM
Been experimenting with it, you can read about the trial and error http://forum.frugalguitarist.com/forum/default.aspx?g=posts&t=339. So far...

The amp stock uses an TDA2030 for power. On a tip at another forum, I subbed in an LM1875 which is a pin for pin match.  Per the spec sheet, looks like it's capable of a bit more power (nearly double?) using the existing power supply. The spec sheet for the TDA2030 lists typical performance of 9 to 11 watts @ 8 ohms (based on measurement method) while the LM1875 lists a typical performance 25 watts @ 8 ohms. Of course the LM1875 needs more power to generate that output but has a wide swing of operation. I subbed it in and it is louder for sure.  Once I'm done will all the mods I'll A/B/ it versus spec.

Of course this will require a new speaker to handle the additional power which will be the second mod.

Third up, the amp uses a red led pair for clipping (in conjunction with a secondary boost circuit). I'm currently experimenting with them subbing in various diodes and I've got some mosfets I'm going to load up tonight.

Stay tuned!
#2
So I want to try an SS amp build. I have several preamp's in mind from RunOffGroove with a modular design, but that leaves the power amp. I've considered an LM3886 build, however I've seen quite a few 30 watt (dual 15 watt) "Class T" power amps assembled for around $30. I've also been playing around with the idea of rehousing one of these in the chassis as the power amp.  Any one tried this with good results?
#3
Amplifier Discussion / Fender Cyber Champ...Win!
January 12, 2009, 09:06:46 AM
I'm writing up a head to head on Fender's Cyber Champ vs their new Super Champ XD in the current FrugalGuitarist.com and was recording some tracks with the Cyber Champ over the weekend...

Wow, the amp records fabulously well. Per their literature, the amp uses their DynaGain preamp digitally switching tone circuits pre or post the preamp to emulate the circuitry of the original amps. I'm surprised there's not more love for them...
#4
Hello Everyone!

Cool little board you have here.

I've been a fan of solid state amps for years and currently have a Tech 21 Trademark 60 which I've gigged countless times and have always received postive comments regarding it's tone.

I'm a former owner of a Roland JC-120 and have regretted selling that amp since the day I let go of it.

Recently, I picked up a First Act 75 Watt VA881 which has a preamp circuit based on their V-Stack pedals and I think it is another solid state amp which was highly overlooked and is very capable of some great tones.