DTF104B Group Buy

[Nicholas Stock]

Fellow enthusiasts. I have a vendor (someone I have done business with before) who wants to sell some DTF104B's (NOS) for $25 dollars each. If you wish to buy some, then please contact me directly and I can organize.

Best,

Nick

[Mark Moulding]

Those are my favorite Numitrons - easy to drive, easy to mount attractively, large format - and pretty rare now.  That price is still a bit steep for a "bulk" purchase; maybe it's about right for a small quantity.  Do you know how many are available?

Also, has anyone ever seen an official RCA data sheet for that tube?  Any chance of posting it somewhere?

Here's a clock I made using DTF-104Bs.

~~

Mark Moulding

[Nicholas Stock]

They are nice tubes. The price may come down a little depending on how much interest there is and the total number of tubes sold, but that is out of my control I'm afraid. They don't appear very often on eBay alas. I've not seen a data sheet for these anywhere and was under the impression they were never actually sold commercially, just engineering samples... is that true? Anyone on the list know more about these?

Cheers,

Nick

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[gregebert]

According to the info on Dieter's website, the filaments are 5V. A bit of data collection from several tubes will get you information on the current, which I'm guessing is around 100mA and hopefully less.

Since these aren't metal-halide displays, the lower the current, the longer the life of the filament. It might make sense for the frequently-changing digits to keep a moderate standby current flowing on all segments to reduce thermal cycling. And always limit the inrush current by using a series resistor or a current-regulator for each segment.

I'm still mulling-over whether I will start yet another project with these tubes, or stick with the long backlog I already have.

[Dekatron42]

I've never seen a datasheet for these either, but at the end of the first page on several other RCA datasheets they mention that the DTF-designation is for developmental numbers. The DR2100 series was previously named DTF122-125 and the DR2200 series was named DTF137-141.

So the DTF104B might never have left the developmental stage to get a proper number.

/Martin

[Nicholas Stock]

Pricing update. If we can get to 500 tubes sold, the price comes down to $22 a tube instead. That's as good as this is going to get at the moment (yes, you read that correctly, 500 tubes).

Cheers,

Nick

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[Dekatron42]

So, what number are we at right now?

/Martin

[Michail Wilson]

I only requested teens; however, if it will help to get the group a better deal, I will take 100.

 

M1

 

From: neoni...@googlegroups.com <neoni...@googlegroups.com> On Behalf Of Dekatron42
Sent: Monday, February 27, 2023 6:07 PM
To: neonixie-l <neoni...@googlegroups.com>
Subject: Re: [neonixie-l] Re: DTF104B Group Buy

 

So, what number are we at right now?

 

/Martin

 

On Monday, 27 February 2023 at 21:23:36 UTC+1 Nicholas Stock wrote:

Pricing update. If we can get to 500 tubes sold, the price comes down to $22 a tube instead. That's as good as this is going to get at the moment (yes, you read that correctly, 500 tubes).

 

Cheers,

 

Nick

 

On Sun, Feb 26, 2023 at 11:52 AM Dekatron42 <martin....@gmail.com> wrote:

I've never seen a datasheet for these either, but at the end of the first page on several other RCA datasheets they mention that the DTF-designation is for developmental numbers. The DR2100 series was previously named DTF122-125 and the DR2200 series was named DTF137-141.

 

So the DTF104B might never have left the developmental stage to get a proper number.

 

/Martin

 

On Sunday, 26 February 2023 at 20:26:53 UTC+1 Nicholas Stock wrote:

They are nice tubes. The price may come down a little depending on how much interest there is and the total number of tubes sold, but that is out of my control I'm afraid. They don't appear very often on eBay alas. I've not seen a data sheet for these anywhere and was under the impression they were never actually sold commercially, just engineering samples... is that true? Anyone on the list know more about these?

 

Cheers,

 

Nick

 

On Sun, Feb 26, 2023 at 12:06 AM Mark Moulding <urro...@att.net> wrote:

Those are my favorite Numitrons - easy to drive, easy to mount attractively, large format - and pretty rare now.  That price is still a bit steep for a "bulk" purchase; maybe it's about right for a small quantity.  Do you know how many are available?

 

Also, has anyone ever seen an official RCA data sheet for that tube?  Any chance of posting it somewhere?

 

Here's a clock I made using DTF-104Bs.

~~

Mark Moulding

 

 

On Saturday, February 25, 2023 at 12:16:42 PM UTC-8 Nicholas Stock wrote:

Fellow enthusiasts. I have a vendor (someone I have done business with before) who wants to sell some DTF104B's (NOS) for $25 dollars each. If you wish to buy some, then please contact me directly and I can organize.

 

Best,

 

Nick

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[Nicholas Stock]

We're at a couple hundred so far, I plan on buying a fair number too, but probably not enough to get to 500...we shall see.

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[Allen]

Put me down for 12 then please.

Allen Wisbey, W1SBY

On Feb 27, 2023, at 5:23 PM, Michail Wilson <M...@michail.com> wrote:



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[newxito]

Hi Nick

If you're willing to send the tubes to Switzerland, I'd take 15. Thanks.

Cheers,  Andy

[Christian Riise Wagner]

I'm down for 15 as well!

[Roger Brinkman]

Hi Nick,

Same for me; if you’re willing to send to Australia, I’d take 15 also. 

Regards

Roger. 

On 28 Feb 2023, at 4:47 pm, newxito <axt...@gmail.com> wrote:

Hi Nick

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[Nick Andrews]

I'm thinking about getting 8 of them or so.   Just ordered 20,000 small pistol primers,  so a little tight right now.  Possibly 12, depending on when. 

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[chuckrr]

Could someone please send me a link to a picture and/or a description/datasheet for this DTF 104B numtron tube?

What is so special about it?  I might be interested in getting a few of these if I can know more about them.

Thank You.  Chuck
 

---- Original Message ----
From: "Nick Andrews" <nickja...@gmail.com>
Sent: 2/28/2023 2:02:04 AM
To: neoni...@googlegroups.com
Subject: Re: [neonixie-l] Re: DTF104B Group Buy
 

I'm thinking about getting 8 of them or so.   Just ordered 20,000 small pistol primers,  so a little tight right now.  Possibly 12, depending on when. 

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAJD4P-isPwJqwRL-FhXPaOFtejW_PwOxsRvF7QV%3D14S9QouYqg%40mail.gmail.com.

[Nicholas Stock]

I'm happy to organize shipping anywhere in the world for these, buyer pays shipping.

Cheers,

Nick

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/202302280036762.SM362165%40ADT-IM1.

[Nicholas Stock]

Folks, we have secured 500 DTF104Bs, so the $22 price is in effect. Thanks to everyone who emailed. There's still time for others to jump in if they want as I (and one other) chipped in on the number to bring us up to 500. I'll be in touch with everyone individually about address/shipping/payment in due course.

Any questions, then you should know where to reach me..

Cheers,

Nick

[Olivier]

Hi Nick,

Count me in for 15 please.

Cheers,

Olivier 

[Alan Tan]

Is there a readily available kit for these tubes? I'll grab some if there is.

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[Michail Wilson]

I don’t think so.

What is the socket used for these tubes?

Sent from Space

On Mar 7, 2023, at 12:54 AM, Alan Tan <ala...@gmail.com> wrote:



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[Mattelec]

I would be in for 10 tubes!

[Richard Scales]

If anyone is interested I do have a solution for driving these, please send me a PM.

 - Richard

[Gelu Burla]

Hi,

I'm interested to buy a kit that use this kind of Numitron tube / if I get it I'll buy the tubes, too.

Regards,

Gelu

https://groups.google.com/d/msgid/neonixie-l/9c67c9e1-d8ad-4654-940b-8053eea388f5n%40googlegroups.com

.

[Alan Tan]

I'd like10 tubes please. 

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[Andrzej Lewandowski]

I take 12 PCS

Nie zawiera wirusów.www.avast.com

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