Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Aug Fri 12, 2022 9:13 am


All times are UTC





Post New Topic Post Reply  [ 18 posts ] 
Author Message
 Post subject: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Fri 19, 2014 6:33 pm 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
I just picked one of these up at an estate sale I stopped into. I believe this unit was made in 1968 or 9. Upon getting it home, as with old radios and TV's, I did my usual take the covers off for a look see before dim bulb power on. Unfortunately, it has a seriously wasted electrolytic can cap. This can is covered by clear plastic. The electrolyte pushed it's way up completely around the can under the plastic, making the values unreadable. Good thing is, none of the stuff got on the circuit board as far as I can see from the top. Would anybody happen to have a service manual, or a lead to the service information for this unit? I don't see anything right off the bat online or at the antique calculator sites. I guess my next stop is one of the calculator forums. Thanks

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sat 20, 2014 3:16 am 
Member
User avatar

Joined: Jan Thu 01, 1970 12:00 am
Posts: 5782
Location: Hill City, SD 57745
Here's a site with some info and pics, they own a couple Friden calculators. Might be source of further info if you wrote to them.

http://www.oldcalculatormuseum.com/friden1162.html


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sat 20, 2014 4:23 am 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 16795
Location: Albuquerque, NM 87123
If you know the approximate voltage of the circuit you should be able to make a fairly accurate guess as to the value just by the size of the cap. Can you take a picture of it?


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sat 20, 2014 2:52 pm 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
The cap is 3" high x 1" across. Voltages that I can see on other caps range from 40V to 300V.
I can't get at the bottom of the board the cap is mounted to until I remove a large delay line assembly.

Image

Image

Image

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sat 20, 2014 6:58 pm 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 16795
Location: Albuquerque, NM 87123
I would suggest removing the cap and cutting the plastic off, then carefully wash it. The value may still be readable.

If you can't read it, you can try connecting an electrolytic of about 350 volts at 20uf and measure the voltage. If it is around 40 volts I would expect a capacitor of that size to be around 1000uf; if it is closer to 300 volts I would guess around 20-30uf.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sat 20, 2014 7:20 pm 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
Thankyou for the info. I think I will restuff or replace all those before I try to power it on, with the looks of that cap, I don't trust any of 'em.

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 2:03 am 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
Well I got the cap out, removed the plastic and cleaned up the area of the nomenclature with a Dremmel wire wheel. I can see that the cap is rated at 200uf, unfortunately, the breach in the can is precisely where the voltage rating is. So, I'll do as suggested, see what I have in likely caps to tack on there temporarily, and bring it up to where I nan measure what the voltage is. If I don't have the caps to do this experiment, I guess I'm off to one of the calculator forums to see if they have a spec for this cap

Image[/URL]

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 2:14 am 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 16795
Location: Albuquerque, NM 87123
Are you sure that is 200uf; looks like 2000uf to me. If it is the voltage rating is probably 50 or less.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 3:20 am 
Member

Joined: Aug Fri 23, 2013 4:49 am
Posts: 592
delete.

_________________
*Deleted*


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 4:47 am 
Member
User avatar

Joined: Jan Tue 23, 2007 9:23 pm
Posts: 2936
Location: Chicago IL
That thing is really neat, never saw a calculator with a CRT before!

_________________
-Carlos


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 5:07 am 
Member
User avatar

Joined: Jul Sun 17, 2011 12:11 am
Posts: 4574
Location: Tehachapi, CA - Bottom end of the Sierras
I've seen a few late 60's desk calculators. Even a few with CRTs. From the looks of it, it appears to be an electrostatically deflected tube. I would have expected to see deflection yokes (magnetically deflected) ! ... real cool !

_________________
Life is like a roll of toilet paper - The closer you get the end, the faster it goes - A.E. Neuman


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Sun 21, 2014 8:16 am 
Member

Joined: Mar Thu 24, 2011 5:23 am
Posts: 643
Location: New Jersey Shore 08724
Location: 08724
+1

Johnnysan wrote:
Are you sure that is 200uf; looks like 2000uf to me. If it is the voltage rating is probably 50 or less.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Mon 22, 2014 12:48 am 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
It could be 2000 mfd, I was kind of undecided looking at it, with all the corrosion, but now that I look at it, that could be another zero there.

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Wed 24, 2014 12:26 am 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
Johnnysan wrote:
Are you sure that is 200uf; looks like 2000uf to me. If it is the voltage rating is probably 50 or less.



Johnnysan, ya nailed it! A member of the oldcalculatorforum Google group came through, 2000mfd @ 35v. I went off to Abel Electronics to pick up a replacement. 2200mfd @ 50v radial. Once the new cap is in, then comes powering it up with the dim bulb and variac, and if it seems to basically work and has promise, I'll go the rest of the way and invest in replacing all the e-caps. Thank you again for your guidance.

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Wed 24, 2014 5:32 pm 
Member

Joined: Jan Thu 01, 1970 12:00 am
Posts: 1596
Location: Detroit, Michigan
I temporarily tacked the new capacitor in...

Image

Hooked it up to my dim bulb, and brought the voltage up over an hour or so...

Image

And, at about 90v, the display popped on, it works!

Image

Reverse Polish Notation, RPN, 22/7: press 22... press first number key... press 7... press divide... = pi.

Image

Now to purchase the rest of the caps, install them, and fix various minor issues like sticking keys and small plastics cracks. And it will be ready for end of the month checkbook duty!

_________________
If there are no rules, then it's not a sport.


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Wed 24, 2014 5:46 pm 
Member
User avatar

Joined: Jul Sun 17, 2011 12:11 am
Posts: 4574
Location: Tehachapi, CA - Bottom end of the Sierras
http://www.oldcalculatormuseum.com/friden1162.html

Nice to see it working !

I did a little reading on that machine. Its display is a 3WP1 tube. Electrostatic deflection. I have one of those in my tube stash. Only $1195 in 1971 !

_________________
Life is like a roll of toilet paper - The closer you get the end, the faster it goes - A.E. Neuman


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Wed 24, 2014 7:57 pm 
Member
User avatar

Joined: Jan Tue 23, 2007 9:23 pm
Posts: 2936
Location: Chicago IL
That thing is off the hook!

_________________
-Carlos


Top
 Profile  
 
 Post subject: Re: Singer Friden 1162 CRT Display Electronic Calculator
PostPosted: Dec Wed 24, 2014 8:32 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 12:00 am
Posts: 22008
Location: Warner Robins, GA
Awesome calculator. I wouldn't mind having something like that.


Top
 Profile  
 
Post New Topic Post Reply  [ 18 posts ]  Moderator: Alan Voorhees

All times are UTC


Who is online

Users browsing this forum: WaltonLover and 8 guests



Search for:
Jump to:  




































Privacy Policy :: Powered by phpBB