Decent preamp

where are you?  I'm in Plainfield, NJ, 07062

If close to me, I have 3 fisher 500c tube receivers, all working, I could verify one in my system and let you try it, keep or return it. no shipping helps a lot on these old dogs.

stay 10 feet away, (we're retired, haven't been out for weeks) 

I'm in Chicago. That Eico looks good but I've never heard of the brand. Have you had a chance to listen to it?

No, I just did a curiosity search on eBay. I've never seen or heard one.

Eico was back in the day of buying Kits to assemble yourself, or buying factory complete assembled units. 

a budget brand, (with features and specs equal to the high priced stuff). It's a lot of preamp for that price, other brands, equal features, will ask far more.

https://www.hifiengine.com/manual_library/eico/st-84.shtml

https://www.audioasylum.com/forums/amp/messages/5646.html

http://www.tronola.com/html/st84_mods.html

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OTHERS....... Eico?????

Quicksilver or c-j.....    can be found for around or slightly more, huge value used of you can buy them right. 

Vincent Audio PHO 701. Excellent $599 unit. Very satisfied with the one I have in my main system.