AO - American Optical Series 20 (H20,H21) lamp

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PeteM
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Location: N. California

AO - American Optical Series 20 (H20,H21) lamp

#1 Post by PeteM » Fri Dec 13, 2019 4:26 am

I recall someone wanting a 100 watt lamp holder for the American Optical Series 20. I have a spare - possible trade for something? These were used in the AO 100 watt lamp housings for the Microstar, Phasestar, and Polarstar scopes of this era.

Conversely, if someone has a spare lamp collector lens for the AO 20 - I'd be interested.

The scope type is as shown here: http://www.pirx.com/droplet/ao20.html

The spare part I have is the black tubular lamp holder with a 3 wire plug. The part I'm looking for is the collector lens immediately in front of this in the microscope base.

apochronaut
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Joined: Fri May 15, 2015 12:15 am

Re: AO - American Optical Series 20 (H20,H21) lamp

#2 Post by apochronaut » Fri Dec 13, 2019 1:39 pm

I'd be interested in the lamp socket. I don't have a spare collector lens , though. Possibly many other items. There was a slight modification on those between the time they arrived on the scene in 1967 and the time they were superceded by the 120. You have to have the right one. Does yours have the dark grey collar between the lamp house and the body?

PeteM
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Joined: Tue Dec 06, 2016 6:22 am
Location: N. California

Re: AO - American Optical Series 20 (H20,H21) lamp

#3 Post by PeteM » Fri Dec 13, 2019 7:49 pm

Hi Phil, my collector lens (cracked) is inserted in a cast metal collar (painted gray in part) with "ears" to ride on approx. 1/4" rods. One ear is a slip fit, the other open to ride somewhat freely.

I may have to end up retrofitting some other light source?

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KurtM
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Re: AO - American Optical Series 20 (H20,H21) lamp

#4 Post by KurtM » Sat Dec 14, 2019 1:02 am

I have an AO20 hulk that appears to have an intact collector lens. (I bought it for the lamp holder to use in my AO120.) Email me and I'll send detail pix, addy below in sig line.
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)aol(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/

PeteM
Posts: 1317
Joined: Tue Dec 06, 2016 6:22 am
Location: N. California

Re: AO - American Optical Series 20 (H20,H21) lamp

#5 Post by PeteM » Sat Dec 14, 2019 4:32 am

Thanks, Kurt. Email on its way. Phil, a message sent.

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