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Eico HF-30 power amp screws help

100.36.145.251

Posted on March 13, 2017 at 18:30:01
gkargreen
Audiophile

Posts: 1435
Location: DC
Joined: February 5, 2005
Does anyone know what screws were used to attach the bottom covers on with? I see that there are speed nuts placed along the bottom and I have tried a number of threaded screws to no avail, any ideas? thanks

 

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Hardware store, posted on March 14, 2017 at 08:32:23
Charlie8521
Audiophile

Posts: 488
Location: South East Michigan
Joined: October 2, 2004
Maybe go to a hardware store that has the bins of bolts, and buy a variety of sizes. Cost is around 10 cents each. Try them and than you will know. There can not be that many options.

 

RE: Hardware store, posted on March 14, 2017 at 08:35:22
gkargreen
Audiophile

Posts: 1435
Location: DC
Joined: February 5, 2005
Thanks, Charlie, I was thinking about taking one of the speed nuts there and making a match, we have an Ace hardware nearby that would do the trick.

 

I am pretty sure they're self-tappers/sheet metal screws -- , posted on March 14, 2017 at 12:00:29
mhardy6647
Audiophile

Posts: 11173
Location: New England
Joined: October 12, 1999
Contributor
  Since:
October 23, 2016
speed nuts notwithstanding.

Just wanted to mention that, based on the other EICOs I've encountered over the decades.

all the best,
mrh

 

Old School Hardware store, posted on March 15, 2017 at 05:30:06
Charlie8521
Audiophile

Posts: 488
Location: South East Michigan
Joined: October 2, 2004
If of value, when I'm looking for small screws I've found going to a local long established private Hardware store tended to have more of what I wanted, and I could buy just one rather than a bag. You might also want to try the Tractor Supply. They might also be a good option to consider.

 

found them!, posted on March 15, 2017 at 08:58:44
gkargreen
Audiophile

Posts: 1435
Location: DC
Joined: February 5, 2005
turns out they were 8-32 machine screws, I thought they would be self-tapping screws like you see in manu of their other products.

 

RE: found them!, posted on March 15, 2017 at 09:56:28
mcgjohn@yahoo.com
Industry Professional

Posts: 425
Location: Midwest
Joined: February 5, 2008
yes, believe 8-32 is correct.

I was more concerned with getting the same screw head style to match the originals.

Have 4 HF-30s; 2 early and 2 later versions.

Be sure to try some better coupling caps, since these amps really come to life with better caps.

have also tried NOS US and Euro output tubes, but find I like the Russian 6P14p EV as among the most musical sounding tubes...

best

 

RE: found them!, posted on March 15, 2017 at 10:17:30
gkargreen
Audiophile

Posts: 1435
Location: DC
Joined: February 5, 2005
thanks, finding period correct screw heads are a bit of a problem, we have guy in the radio club that tears down old gear and sells the parts, tube sockets, pots, etc., and now vintage screws and nuts at 40-50 nuts/screw for a buck, can't beat that price and for those tiny 6-32 nuts used back in the day that you can't find, a real bargain! And yes, I restored these amps totally with new K42Y coupling caps.

 

cool -- good going! (nt), posted on March 15, 2017 at 13:31:57
mhardy6647
Audiophile

Posts: 11173
Location: New England
Joined: October 12, 1999
Contributor
  Since:
October 23, 2016
nt
all the best,
mrh

 

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