Author Topic: what the heck is a HEP 801?  (Read 2260 times)

pinkjimiphoton

what the heck is a HEP 801?
« on: February 12, 2019, 12:57:16 PM »
i know its si and pnp, apparently some kind of fet...
but its got 4 leads?
can't find a data sheet anywhere!
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

Kevin Mitchell

Re: what the heck is a HEP 801?
« Reply #1 on: February 12, 2019, 01:26:28 PM »
I'm finding N-Channel JFET some noting it as an alternative to 2n5457 and MFP102
sk3112 is it's RCA equivalent.

Wait... 4 leads?  :icon_confused:

How many fingers?
« Last Edit: February 12, 2019, 01:34:21 PM by Kevin Mitchell »
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Mark Hammer

Re: what the heck is a HEP 801?
« Reply #2 on: February 12, 2019, 01:41:20 PM »
My crusty old fuschia 1973 Motorola catalog for HEP devices lists it as having a TO-72(A) pinout.  Using the diagram below as reference point (looking from below), the pins are as follows:
1- drain
2 - source
3 - gate
4 - case and substrate


digi2t

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Re: what the heck is a HEP 801?
« Reply #3 on: February 12, 2019, 01:58:09 PM »
Aren't there also some jfet's that featured 2 gates? I remember them being popular in the old Kustom amps for switching.
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pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #4 on: February 12, 2019, 02:25:17 PM »
My crusty old fuschia 1973 Motorola catalog for HEP devices lists it as having a TO-72(A) pinout.  Using the diagram below as reference point (looking from below), the pins are as follows:
1- drain
2 - source
3 - gate
4 - case and substrate



awesome, thanks mark!!
i'll find something to put it to good use. so just tie the case to ground? or leave it unconnected?

i know i got some boards in that need similar fets, so will try and use it in one of them.

cool, i LOVE old stuff!! ;)
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

Paul Marossy

Re: what the heck is a HEP 801?
« Reply #5 on: February 12, 2019, 03:03:40 PM »
"HEP 801" sounds like a virus, or a star in a distant galaxy  :icon_lol:

pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #6 on: February 12, 2019, 03:07:21 PM »
or a niteclub in the 50's lol
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

Rob Strand

Re: what the heck is a HEP 801?
« Reply #7 on: February 12, 2019, 07:45:55 PM »
Quote
or a niteclub in the 50's lol

Things like this can only be caused by an alien virus:
Plopping around the pot since an early age.

pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #8 on: February 12, 2019, 10:55:40 PM »
HAHAHAH

its hip, its now, its 50 @#$%in' years ago....lol

hmmmmm... aliens crash near roswell, 1947

suddenly the transistor is invented.... coinkydink?

lol

man.... dr smith. <shudder>
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

Mark Hammer

Re: what the heck is a HEP 801?
« Reply #9 on: February 13, 2019, 07:47:08 AM »
There's a micro-brewery/eatery my son in Halifax likes to go to called "The Good Robot".  Bizarre name, eh?  Then it finally dawned on me that the place is on Robie St.; Robby = the "good" robot in Forbidden Planet and Lost in Space.  My son tells me that many items on their menu have names with pop culture references.  I doubt that any of their beers are dubbed "HEP 801", though.

Certainly, somewhere in this world, people are driving around with license plates that are - unbeknownst to them - semi-conductor numbers.  E.g., somebody somewhere has a beat-up '94 Toyota Corolla with "JRC4558D"  or "MPSA13" on the plates.

Rob Strand

Re: what the heck is a HEP 801?
« Reply #10 on: February 13, 2019, 04:23:04 PM »
Quote
Forbidden Planet and Lost in Space.
Apparently the guy that design Robby the Robot also designed the Lost in Space robot.  When you look at the two you can see that have similar design features.  IIRC there were a few others he designed before those.

Quote
Certainly, somewhere in this world, people are driving around with license plates that are - unbeknownst to them - semi-conductor numbers.
There was one close to BC109 near my house, can't remember what the odd part was.

Plopping around the pot since an early age.

anotherjim

Re: what the heck is a HEP 801?
« Reply #11 on: February 13, 2019, 04:38:33 PM »
There was another called Tobor. I wonder how they came up with that name?

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Ben N

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Re: what the heck is a HEP 801?
« Reply #12 on: February 13, 2019, 04:48:17 PM »
"Hep, hep" was what some anti-Jewish rioters in the early 19th century Germany chanted. Supposedly, it stood for "Hierosolyma est perdita", or "Jerusalem is lost," which --again, supposedly--was supposed to link this activity to the Crusades.

Mark Hammer

Re: what the heck is a HEP 801?
« Reply #13 on: February 13, 2019, 05:17:38 PM »
There was another called Tobor. I wonder how they came up with that name?

Yeah, that one is a real head-scratcher.  I'm going to have to think about that one for a while.

pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #14 on: February 13, 2019, 05:23:09 PM »
tobor = robot backwards lol
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #15 on: February 13, 2019, 05:24:04 PM »
"Hep, hep" was what some anti-Jewish rioters in the early 19th century Germany chanted. Supposedly, it stood for "Hierosolyma est perdita", or "Jerusalem is lost," which --again, supposedly--was supposed to link this activity to the Crusades.


@#$%in assholes. i don't hate anyone, but i really despise people who hate on others
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

Ben N

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Re: what the heck is a HEP 801?
« Reply #16 on: February 13, 2019, 08:49:51 PM »
Probably manipulated by the men behind the curtains. The fools with the pitchforks and the torches usually are. Racism = mind control.

pinkjimiphoton

Re: what the heck is a HEP 801?
« Reply #17 on: February 13, 2019, 09:12:15 PM »
funny how if people forget stuff, it tends to recurr.
sad. 'ugely sad.  ;)
"maybe you should stay with yo mama....."

what the @#$% do you mean, it doesn't sound distorted enough, are you high???????????????????

#FuzzyGoodness

bluebunny

Re: what the heck is a HEP 801?
« Reply #18 on: February 14, 2019, 02:55:48 AM »


I'm sure we've seen this fella at Rob's gaff...   ???
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anotherjim

Re: what the heck is a HEP 801?
« Reply #19 on: February 14, 2019, 01:37:52 PM »
They speak of "Plan 9 from outer space" in hushed, reverent tones, but "Tobor the Great" is on an entirely different existential plane. Even the trailer is awesome. Yewtoob has quite a lot of it.

4 wire j-fet. I don't know what can be done wiggling the extra substrate connection. Anything?

Jimi should now design a fuzz called the HEP-Cat. Or Dr Smith.
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