diytube.com

After reading more than the average beginner reads (I've bought four books & checked out 7 from Library...plus the internet), I realize that it may take a long time before I can custom design my own amplifier and build it (possibly years). That said however, I wanted to get your initial thoughts on what I currently imagine my final ultimate amp design will end up being (just an abbreviated summary of some specs).

1) 75 watt monoblock (75 per amp for 75 per channel)
2) push pull triode mode ( $1,000 allocated per block for output tubes)
3) 10Hz to 40Khz +/- 1 db
4) high signal to noise
5) Class A
6) toroidal power supply

So I'd love to get your initial thoughts on my long term goal. I know that I have many short term goals to achieve before I get there but your thoughts will probably help me adjust the beginning part of the quest/journey. In other words, I might be very far from Taiwan or Peru but to increase my chances of ever arriving at one of those countries, my first steps will depend on which country I'm heading towards.

I'm an extreme reader and it makes my journey different than some of my friends who learn better by diving in first. We're all different and I feel like I do better in complex projects if I read a lot first.

Your thoughts are valued and closely considered.
kind thanks
Eddie

Hi,

Almost all goals are achievable for the budget except you aren't going to get 75W in class-A PP triode-mode for $1K. AB1 and UL, yes.

Some PP amps even sound far better in UL or even pentode mode than triode. Go for sound, not specs

Cheers!

Two 845s or GM70s will get you 75 watts, but the heat from them will be like from the headers of a 454.

Might be best starting a little smaller, like PP KT88, will get you about 15 watts of audio in triode, and only 100 watts of heat.

Patrick Turner designed a low-distortion 300W mono-block. He uses 12 6550s. 6 6550s in triode mode will yield ~75W audio output in AB1. Read his notes about maximum, available Class A power.

http://www.turneraudio.com.au/300w-monobloc-about.html

If people are interested in compiling answers from X-posted threads to see what all was discussed:
http://diyaudioprojects.com/Forum/viewt ... f=9&t=4580

I think he means $1K for the tubes, not total.

Just the iron will be more if its done right.

John