Forum rules
The following requirements must be followed when advertising personal antique radio / TV / audio / phono items (such as discussed in the forums here) for sale in the classifieds forum::
- Titles must START with : FS (for sale) or WTB (want to buy) or Trade or Free at the beginning of the title..
- FS posts must have an "asking" price and offers may be sent by PM. Are you parting something out? ... price each major part (not things like screws and nuts)
- There must be a location somewhere in the ad or the members profile (City & State or Zip Code are the minimum requirement).
- Ads are limited to two per day, and may not be bumped sooner than 7 days after the last post to the thread.
- No outside sales links are allowed other than to pictures of actual items being sold. No links allowed to eBay, Craigslist etc.
- This is NOT a discussion forum. If you're not buying or supplying or suggesting a relevant solution, don't post - send a Private Message. Comments on pricing will be deleted.
- First to post to an item for sale stating "I WILL TAKE IT" it is first in line. Subsequent claims will be followed in the order they are posted. Claims to "Take it" can be conditional on unknowns such as shipping costs.
- Any "PM sent" posts without posting a reason for the PM will be deleted as they are meaningless to anyone else reading the thread.
- Once a deal is made, edit the title to say so and the thread will be locked
If your thread or post disappears - read the rules again - no warnings or explanations will be given when threads or posts are deleted.
 
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7jp4-guy
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Post subject: WTB: B-5991 Nixie with round grid supports  Posted: Apr Tue 17, 2012 1:49 am |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1852
Location: Cambridge, Massachusetts, USA
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I am trying to restore an HP 3440A digital multimeter. Unfortunately, one of the nixie tubes is cracked from corrosion of one of the pins. I am looking for a replacement that will match the others, so if anyone has a B-5991 nixie which has little round washers visible from the front of the tube at the ends of the grid support wires (as opposed to the newer ones which are square) I would be interested in buying it.
Thanks!
-Matthew
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If it ain't broken, you’re not trying hard enough...
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mescalero
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 2:49 am |
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Joined: Feb Thu 24, 2011 1:29 am
Posts: 2802
Location: Dallas, TX - in the city but with bobcats and coyotes
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A National (brand) 8422/5991 will be a direct replacement. I have four NOS but that's just enough to build a clock. If nobody offers one up in a day or two, send a PM to me. After all, the meter is a worthy cause too. I have one. It gets some attention at work when I use it. 
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In a triode, no one can hear you screen.
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Alan Douglas
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 3:06 pm |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 23520
Location: Pocasset, Cape Cod, MA
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I have an H-P boxed part 1970-0009. The former owner has written 8422 on the box. I didn't pull it out but I can see it has round washers on the face. No idea what these things go for but I'm definitely open to an offer.
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7jp4-guy
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 3:26 pm |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1852
Location: Cambridge, Massachusetts, USA
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Thanks Alan!  Check you PM. -Matthew
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If it ain't broken, you’re not trying hard enough...
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radiodale1
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 4:11 pm |
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Joined: Aug Sun 12, 2007 8:59 pm
Posts: 847
Location: Greenville TX
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7jp4-guy
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 6:44 pm |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1852
Location: Cambridge, Massachusetts, USA
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Quote: Thanks Dale, but that one has the square grid supports. -Matthew
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If it ain't broken, you’re not trying hard enough...
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7jp4-guy
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Post subject: Re: WTB: B-5991 Nixie with round grid supports Posted: Apr Tue 17, 2012 6:51 pm |
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1852
Location: Cambridge, Massachusetts, USA
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Found! Thanks all.
-Matthew
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If it ain't broken, you’re not trying hard enough...
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