They made a few with LED.  Here's a time interval counter on eBay.  I'd 
love one in good condition but this needs too much work!
https://www.ebay.com/itm/VINTAGE-Eldorado-Model-797-EI797-R5-Rack-Mount-Tube-Time-Interval-Counter-PARTS-/153900473217?_ul=IN

Bill

On Saturday, February 5, 2022 at 11:20:04 AM UTC-7 [email protected] 
wrote:

> Hi All,
>
> Does anyone know whatever happened to Eldorado Electronics? I wonder if 
> they ever made a counter or DVM that didn’t use Nixies.
> Don’t recall ever seeing any but maybe the group has some info.
>
> Rich
>
> On Feb 4, 2022, at 6:28 AM, Bill Notfaded <[email protected]> wrote:
>
>
> Amazing it looks like it's working fine Martin.  Does anymore know how 
> many counters they made?  I have a few but it's my guess they were one of 
> the companies that made the most counters with nixie up there with HP and 
> Systron Donner.  One SYSTRON DONNER 7018 I have two of has the inverted 
> tubes in them that hang down instead of standing up.  I bought a second one 
> missing one tube.  Supposed to have 8 tube but someone must have needed one 
> and removed it.
>
> On Friday, February 4, 2022 at 4:19:36 AM UTC-7 Bill Notfaded wrote:
>
>> Love it Terry!  I love eldorado counters super cool stuff!  I'm a counter 
>> freak to begin with so anything with nixie I can hook up to a 10MHz 
>> reference is really awesome!
>>
>> Bill
>> On Monday, January 31, 2022 at 5:19:49 PM UTC-7 Bill van Dijk wrote:
>>
>>> Thanks Terry, I have already found a very good scan on-line. Amazing 
>>> manual, it goes through a complete discussion on how the unit works and 
>>> includes a schematic with parts list. It includes instructions on 
>>> calibration also. Compare that with what you get today, if anything at all.
>>>
>>>  
>>>
>>> Bill v
>>>
>>>  
>>>
>>> *From:* [email protected] [mailto:[email protected]] *On 
>>> Behalf Of *Mac Doktor
>>> *Sent:* Monday, January 31, 2022 6:52 PM
>>> *To:* neonixie-l <[email protected]>
>>> *Subject:* Re: [neonixie-l] El Dorado Frequency Counter Restoration
>>>
>>>  
>>>
>>>  
>>>
>>> On Jan 31, 2022, at 3:49 PM, Bill van Dijk <[email protected]> wrote:
>>>
>>>  
>>>
>>> I have an Eldorado model 1615 in my collection. It has 6 Nixies in the 
>>> display. It is cooled with a fan which sounds like a fully loaded 747 
>>> taking off! J
>>>
>>> I have the manual for the 1615 if anyone needs it.
>>>
>>>  
>>>
>>>  
>>>
>>> Terry Bowman, KA4HJH
>>> "The Mac Doctor"
>>>
>>> https://www.astarcloseup.com
>>>
>>> "Every kid starts out as a natural-born scientist, and then we beat it 
>>> out of them. A few trickle through the system with their wonder and 
>>> enthusiasm for science intact."—Carl Sagan, *Psychology Today*, 1996
>>>
>>>  
>>>
>>> -- 
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>>> .
>>>
>>
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