[nineohtoo]

Hi. Someone local has this amp, and he made it aware that its mono. I was wondering if there was possibly anyway I can make it a stereo amp. If so, is it possible to get a headphone jack on this some how? Thanks.

Its an Eico HF-20:

Here's some pics of the insides from an ebay auction:

and the back:

Thanks for any help you guys can offer!

 

[firefox360]

The amplifier only has one channel on it, so the only way to have a stereo setup would be to buy 2 of those, or to build another replica of it.

 

[Fitz]

Quote:

Originally Posted by firefox360 /img/forum/go_quote.gif The amplifier only has one channel on it, so the only way to have a stereo setup would be to buy 2 of those, or to build another replica of it.

Beat me to it... I was gonna photoshop a pic of two of them side by side and say "here's how."

 

[Lazarus Short]

Finding another might be worthwhile, as the output trannie looks like a good one. The caps are crap, but they are easy to replace. What are the output tubes?

Laz

 

[Low Fidelity]

2nd the motion for picking up another amp or building two new ones based on the design. Might be hard to match that tranny and the sound from those awfully old caps if you try to build one and run it beside the other.

 

[Vaughn]

It's a good amp, push-pull 6L6GC's similar to a pair of Heathkit W5M's I used
to own that were beautiful sounding. I say get the amp and scour Ebay for
a mate.

 

[Uncle Erik]

Quote:

Originally Posted by Lazarus Short /img/forum/go_quote.gif Finding another might be worthwhile, as the output trannie looks like a good one. The caps are crap, but they are easy to replace. What are the output tubes? Laz

Looks like 6L6 output, push-pull.

It looks like it has a preamp in there, as well. You could get a second one and try to run them as monoblocks (sorta) but you'd have a separate volume control for left and right. A little inconvenient, but you could do it.

Believe it or not, some folks are into mono recordings. If you ever want to explore early LPs and 78s, this might be what you're looking for. Or if it's exceptionally cheap, you might want to fix it up and use it with just one speaker in the office.