made in 1968 - my newly acquired Takeda Riken Universal Counter TR-5577 - Page 1
Forum section: electronics / testgear

author: koppel
author_rank: Newbie
timestamp: June 19, 2019, 10:33:59 am
content: Hello everyone,I cannot recall if this is my first posting on EEVblog, but I know it won't be my last. However, I am a regular poster on Vintage Computer ForumAs a quick introduction, I am 68yo Industrial electronics + Robotics + Automation Higher Technician and Engineer. I started back when I was 14.I have my own small Lab-workshop with a wide variety of test gear, both current and vintage, 60% plus working. Also some Vintage ComputersLargest group being Tektronix 7000 series, TM500-5000, Prism 3000 logic analysers. plus quite a bit of vintage Tek scopes and a Curve Tracer.Also have various Marconi, B&K, HP, Fluke, Morotola to name a few Test Instruments. PLUS I own a working EAI TR-20 Analog Computer cica 1964Anyway, I recently saw a listing on a website Gumtree for some scientific gear in 4 wooden cases plus a Universal Counter. You guessed it I got it. Drove 2 hrs each way in a beat up 3ton tip truck to get it. (my car is out of action due to blown head gasket)So yesterday I dragged the Counter up to the house and opened it up in the lounge room as it was toooooo wet to go down to my workshop.unit is a Takeda Riken Universal Counter TR-5577. From what marking I can see so far its circa late 1968and NO I am NOT going to be silly and just put power to it as friend said 'power it up and lets see the NIXI's'.For one it needs a clean, PCB edge connectors on 3 boards I pulled look clean, but I will draw clean and reseat all boards before it gets any power. In fact I plan to power it up with just PSU section plugged in as a start.So here are a few pics to start.top viewpartial bottom viewone of the display pcb'sI would love to find some manual and circuits.Also open to any thoughts or suggestions foke here may have, (other than can I buy it)regardsDavidMelbourne, Australia

author: koppel
author_rank: Newbie
timestamp: June 19, 2019, 12:39:28 pm
content: it is interesting that what I believe is the crystal oven had been modified.So do I search for an original part, or look for a professional crystal oven from a later instrument, and make an adaptor to plug it in to the socket base?Also if there is someone that reads Japanese can they tell me what the black box alongside this crystal unit is?I think it's a high voltage transformer, based on the kV symbol, but I have done no detailed review of the unit

author: xrunner
author_rank: Super Contributor
timestamp: June 19, 2019, 01:18:42 pm
content: That's really nice. I like the ceramic terminal strips. Keep us up to date.

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 19, 2019, 01:39:35 pm
content: According to Google Translate on my phone:Model:Test voltage:Serial Number:Date of Manufacture:International Transformer Ltd. Certification:

author: Cubdriver
author_rank: Unknown
timestamp: June 19, 2019, 05:16:42 pm
content: Ceramic terminal strips and edge connectors. Looks like an HP counter and a Tektronix scope had a baby.Cool old instrument - nice find!-Pat

author: koppel
author_rank: Newbie
timestamp: June 20, 2019, 11:14:19 am
content: PAOQBZ Thank you for the following translation of the Japanese PAOQZB."According to Google Translate on my phone:Model:Test voltage:Serial Number:Date of Manufacture:International Transformer Ltd. Certification:"I reopened unit this evening and took a photo of the underside of this "transformer" that chassis marking calls T1just from appearance, I am deducing it has 2 sets of primary windings each being 0v-100v-115v that are paralleled.both 0's are linked and both 100v's are linked.This matches with the marking on back at the AC mains input fuse reading 100vThe T1 secondary voltage appears to be a 1 amp winding 0v-31v-32vSo now to trace the Mains AC from the sealed EMI filter block output, hopefully via the power switch on the front panel back to this T1 input terminals.

author: TERRA Operative
author_rank: Super Contributor
timestamp: June 20, 2019, 11:22:14 am
content: I'll send off an email to Advantest Japan to see if they have any info on this unit.

author: koppel
author_rank: Newbie
timestamp: June 21, 2019, 01:07:19 am
content: This pic shows what came as the Job Lot when I bought the Counter. No idea what I will use any of it for

author: TERRA Operative
author_rank: Super Contributor
timestamp: July 02, 2019, 04:29:10 am
content: Well, Advantest Japan said they have no info at all as it is so old unfortunately.