(OT) Ics needed..(they drive the orange glow...)

[orange_glow_fan]

Hi,

Need a UHP480 and UHP481 ic....possibly made by Sprague........?

Any help appreciated...

Kerry

[glasslinger]

Hello!

try www.ctg123.com/rapid-quote-system/request/?p=UHP480.

[threeneurons]

Have you actually tried this one ? There are tons of so called part brokers on the web. Most are useless, even if you're a manufacturer. For hobbyist they're especially useless. 

I thought I had some, but they ended being UHP408 chips. The prefix does suggest Sprague. Have you tried Allegro ? That's the name they last operated under.

On Tuesday, October 2, 2012 5:33:06 AM UTC-7, glasslinger wrote:

Hello!

try www.ctg123.com/rapid-quote-system/request/?p=UHP480.

[jb-electronics]

I wouldn't say they are totally useless. Mostly, yes. But sometimes you can achieve nice results. Recently I got a new in box NL-7094 via one of those brokers. But that is after emailing hundreds of suppliers... ;-)

Jens

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[Nick]

On Wednesday, 3 October 2012 10:38:35 UTC+1, Jens Boos wrote:

I wouldn't say they are totally useless. Mostly, yes. But sometimes you can achieve nice results. Recently I got a new in box NL-7094 via one of those brokers. But that is after emailing hundreds of suppliers... ;-)

About 10 years ago I bough two NIB 7094s for about USD 5 !

Unfortunately, they were RCA 7094s -  RF power output pentodes!

The upside was they are actually very valuable too, so whilst I don't do power RF stuff much, the tubes are worth perhaps USD 100 each now and are still in big demand.

Got me interested in RF design though....

[jb-electronics]

Happened to me, too! But I made sure to have the seller send me a picture beforehand and so I did not purchase it in the end.

Jens

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[Charles MacDonald]

On 12-10-03 11:30 AM, jb-electronics wrote:

>> About 10 years ago I bough two NIB 7094s for about USD 5 !
>>
>> Unfortunately, they were RCA 7094s - RF power output pentodes!

Released by RCA Jan 20, 1958 Heater 3.2 amps (later 2.85) at 6.3 Volts.
DC plate volts 1500 Continuous service, 2000 intermittent service.
Plate dissipation 100 or 125 Max Watts.

"High power Gain, ... in fixed and Mobile equipment as as an RF power
amplifier and oscillator as well as an AF power Amplifier and
modulator.. Full power at 60Mhz and reduced input up to 175Mhz."

Stands five inches high from pins to Plate connection, and 2.56" maximum
diameter. Jumbo 7 pin base with Pin 4 larger than the rest.

Yes, that is a bit different from an IC or a Nixie tube


--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
http://users.trytel.com/~cmacd/tubes.html
No Microsoft Products were used in sending this e-mail.

[Adam Jacobs]

WOW! Who's complaining? Build yourself a nice little CW transceiver or
linear amplifier.
Those old power pentodes are getting scarce. :(

-Adam

[Adam Jacobs]

Somehow I missed the part where they're full power on the 6m band and
partial power on 2m. Sounds like some nice finals to me.

-Adam W7QI

[Charles MacDonald]

On 12-10-03 07:06 PM, Adam Jacobs wrote:
> Somehow I missed the part where they're full power on the 6m band and
> partial power on 2m. Sounds like some nice finals to me.

My handy reference on tubes is from the tube collectors association (one
of the best 50 bucks spent on information) and includes the "Original"
data on most types, sometimes there is changes on later versions.

[Nick]

On Thursday, 4 October 2012 00:20:54 UTC+1, charles wrote:

On 12-10-03 07:06 PM, Adam Jacobs wrote:
> Somehow I missed the part where they're full power on the 6m band and
> partial power on 2m. Sounds like some nice finals to me.

My handy reference on tubes is from the tube collectors association (one
of the best 50 bucks spent on information) and includes the "Original"
data on most types, sometimes there is changes on later versions.

...or you could just use Frank's pages, which are wonderful, and free!

They are indeed lovely tubes, which is why I haven't sold them. I have a collection of large power pentodes etc. of which the 7094s are amongst the smallest, but I don;t feel the need to build RF kit... some of the Russian ones are lovely - This winter I'll be building an amp based on 6C33Cs - one of my favourite output triodes...

Having said that I've just built two "pantry" AM transmitters so that we can enjoy the various valve ("tube" to our US cousins) radios which tend to be AM (MW/LW/SW) and sometimes FM (VHF) - for the VHF I'll have to build a small (<100mW) xmtr so that I can use all wavebands).

Back on topic slightly, I've found that multiplexed nixie clocks interfere terribly with old valve AM radios, partly because the radios have poor selectivity, but also due to the wide spectrum of near-field interference that poorly screened uP projects emit... AM is of course extremely vulnerable to this type of interference.

[Adam Jacobs]

Probably not as vulnerable as single sideband. :S

Are you sure that it is the multiplexed nixies and not the switching
supply? I'm just curious at this point, I've always assumed that the
rapid ionization/de-ionization of the neon would create some RF noise,
but no real idea. When I built my WWVB nixie clock, I shut down the HV
supply (and then also by definition the nixies) while listening for
timesync.

-Adam W7QI

On 10/4/2012 1:31 AM, Nick wrote:
>
> Back on topic slightly, I've found that multiplexed nixie clocks
> interfere terribly with old valve AM radios, partly because the radios
> have poor selectivity, but also due to the wide spectrum of near-field
> interference that poorly screened uP projects emit... AM is of course
> extremely vulnerable to this type of interference.

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[Charles MacDonald]

On 12-10-04 04:31 AM, Nick wrote:

> ...or you could just use Frank's pages, which are wonderful, and free!

I often use those also. The Data from the TCA is actually a scan of the
entire registration file from the RMA, RTMA, EIA, JEDEC and a few other
names that the used over the years. each file Generally has the Official
Data sheet, and sometime back and forth between the various makers as
they wanted to change the specs to conform to what they actually
produced. It also included the same information of the 1nxxx and 2Nxxx
semiconductors.

The TCA folks did a nice index which lets you see when the "release"
went out as a mailing to the rest of the industry. This is sometimes
not the date that the tube was actually first available as the makers
would try to get a "Socket Win" from Receiver makers in advance of
letting their competitors what they were planing to come out with.