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Old 21st February 2010, 10:16 PM   #11
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Hi guys.

My GTA SE-85 might not get repaired (parted out instead) so I am looking at other tube options and I found this for sale locally.
Quote:
Eico HF-86 uses EL84 x4 12DW7/7247 x2 EZ81/6CA4 x2. Upgraded with banana binding posts and genuine brandnew ALPS volume controls purchased in Japan. Asking $350.
Mark, would that work ok with the Alp12's or too old to be worth considering.
Can you list your choices to use with the Alp12's.

Thanks.
Dave.
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Old 21st February 2010, 10:36 PM   #12
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The Eico is a nice little amp with good iron. An honest 12 W, and that it is some 40 years + old a testament to its reliability. If they haven't already the caps should be swapped out for modern ones.

It should have no diificulty driving the A12 especially given your use as an extended mid tweeter.

My electronics guy got one of these in for basic maintenance, and shortly thereafter brought it back twice for further enhancements. He is thrilled with it.

We have a similar topology amplifier built up from scratch based on Scott iron and it is a stunner, even thou only 3.2 W (Class A triode)

EL84 is my favorite output tube.

dave
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Old 21st February 2010, 11:12 PM   #13
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Hi Dave (Service Guy),

Here's an 12 watt EL84 amp we've been using with the Alpair 12's. Its made by Tony Wong (member ID is Musik007) here in Hong Kong. I like it very much.

I'm trying some vintage Polam EL84 tubes in this amp during the next 2 weeks.

Cheers

Mark.
Attached Images
File Type: jpg _DSC4438EL84SE_sml.jpg (47.1 KB, 68 views)
File Type: jpg _DSC4439_EL84SE_sml.jpg (44.3 KB, 67 views)
File Type: jpg _DSC4440EL84SE_sml.jpg (69.9 KB, 68 views)
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Old 22nd February 2010, 12:08 AM   #14
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Planet.
Is $350 CDN to much for it?
Should I keep looking for something a little newer?

Mark.
To get that here to Canada will be probably more than I would like to spend, but it looks awesome.

Dave.
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Old 22nd February 2010, 01:41 AM   #15
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Hi Dave (Service guy),
Tony' EL84 is full of nice goodies, posh caps and all.

Tony makes another amp - 12 watt 6V6. It's cheaper, all new parts which is handy. I'm running this unit on other drivers right now. I also like this amp. It's very smooth and warm which might be a nice match for the Alp12's since you're adding LF via woofs.

I'll connect Alp12's to it, take some pics and let you know.

I think you're look at spending 700 USD including the shipping.

Cheers

Mark.
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Old 22nd February 2010, 07:19 AM   #16
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Hi Dave (service guy),
Here's 2 pics of Tony's 6V6. Consists of 4 X 6v6 doing the power, 2 X EL84 making for an interesting driver stage and a single input 12 AX7.

Tony tells this is a minimalist power 12 watt (Class A/B) push-pull design. I'll give the Alp12's some more play time on this amp and feed back.

Cheers

Mark.
Attached Images
File Type: jpg _DSC4526_6v6PPmk11_sml.jpg (52.7 KB, 60 views)
File Type: jpg _DSC4527_6v6PPmk11_sml.jpg (51.1 KB, 54 views)

Last edited by markaudio; 22nd February 2010 at 07:23 AM. Reason: typo mending
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Old 22nd February 2010, 07:41 AM   #17
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Quote:
Originally Posted by service_guy View Post
Planet.
Is $350 CDN to much for it?
Should I keep looking for something a little newer?
$350 CAD is a fair price if it is in good shape mechanically, cosmetically, and functionally, It has a bit of collector value in it. I'd suggest that it is much better engineered than your Golden Tube. If the caps & critical Rs have been replaced it is probably very good value.

The local i mentioned probably has >$600 into his. And he is very pleased with it. And with the value for the dollar.

With the upgrades i've mentioned and perhaps bypassing the tone stacksi i'm going to guess it to be in the same sonic ballpark as the 2 amps Mark has posted. If you can diy those bits you'll come in at less than Tony's amps, if you pay someone to do it, it will likely be more.

There are a number of well documented amplifier projects (with many variations & cross-pollination) that are also in this amplifier "class". El Cheapo, Red Light District, Baby Huey, Music Machine. Depending on iron, parts and execution they range from good to giant killers.

dave
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Old 23rd February 2010, 01:30 AM   #18
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Hi Dave.

I think it is not to bad of a deal, I can have all the caps and resistors changed at no cost (with top quaility parts) so I offered the gentleman $300 dollars and I will see what happens.
Quote:
I'd suggest that it is much better engineered than your Golden Tube.
I agree.

I won't find out until Friday, I am leaving at 4am EST for Florida on a business trip.

I will post up when I know more.
I may have a buyer for the GTA as a parts amp.
Later.
Dave.
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Old 23rd February 2010, 02:02 AM   #19
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Hi.
It is sold already.
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Old 23rd February 2010, 09:01 AM   #20
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Hi Dave (service guy),
Don't worry too much re missing the Eico. There's usually a downside to owning an older amp. I love old gear but much of my collection sits in boxes. I don't have the time to play with these toys. When I did have time, I was forever changing parts. I had a lovely British Leak amp but by the time I'd finished repairs, most of the original components had to be ditched. I ended up with a virtually new amp and could never get to sound like the original!
Anyway, have fun in your search.

Cheers

Mark.
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