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Radio Wrangler · 27th Nov 2019, 5:43 pm

Type 21-S ? That's a new AVO variant on me. The case seems to be the same as the EA113, but I wonder if the 21-S is a simpler, passive meter without the amplifiers of the EA113?

Yes, it's interesting. Yes, it's worth keeping. But I'd rather see these things being used.

The almost identical looking EA113 seems to fetch crazily high prices on auction sites. It's believed to be because AVO list these as necessary to performing calibration on their later valve testers, and the valve testers are cult items amongst guitarists and hifi extremists. These factors elevate prices. I don't think the 21-S will have the same price hype factor as the EA113.

So, you've got a nice unit, with all the paperwork and things. Worth keeping together

David

27th Nov 2019, 5:43 pm	#2375
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,901	Re: AVO Multimeter survey Type 21-S ? That's a new AVO variant on me. The case seems to be the same as the EA113, but I wonder if the 21-S is a simpler, passive meter without the amplifiers of the EA113? Yes, it's interesting. Yes, it's worth keeping. But I'd rather see these things being used. The almost identical looking EA113 seems to fetch crazily high prices on auction sites. It's believed to be because AVO list these as necessary to performing calibration on their later valve testers, and the valve testers are cult items amongst guitarists and hifi extremists. These factors elevate prices. I don't think the 21-S will have the same price hype factor as the EA113. So, you've got a nice unit, with all the paperwork and things. Worth keeping together David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done