UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Test Gear and Workshop Equipment

Notices

Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

Closed Thread
 
Thread Tools
Old 11th Dec 2018, 10:17 pm   #1
goughy57
Triode
 
Join Date: Jun 2018
Location: Cardiff, Wales, UK.
Posts: 21
Default Micronata low distortion generator.

Hi all.

Anyone know what powers one of these old testers? I've got two black wires hanging from the board. I suspect it's a PP9 or similar.

Any advice? Thanks.
goughy57 is offline  
Old 11th Dec 2018, 10:48 pm   #2
chriswood1900
Octode
 
Join Date: Jan 2007
Location: Dorridge, West Midlands, UK.
Posts: 1,475
Default Re: Micronata low distortion generator.

A bit more info or picture would help identify the model. A quick Google reveals several different items with similar names.
Chris
chriswood1900 is online now  
Old 15th Dec 2018, 8:59 pm   #3
Chaparal
Hexode
 
Chaparal's Avatar
 
Join Date: Apr 2007
Location: Wiesbaden, Germany
Posts: 333
Default Re: Micronata low distortion generator.

Maybe this one
Micronta 22-9510 - LF Generator

Peter
Attached Thumbnails
Click image for larger version

Name:	Micronta 22-9510 - LF Generator (Tandy) - front.jpg
Views:	99
Size:	75.3 KB
ID:	174682  
Chaparal is offline  
Old 16th Dec 2018, 12:11 am   #4
Reelman
Octode
 
Reelman's Avatar
 
Join Date: Aug 2008
Location: Rotherham, South Yorkshire, UK.
Posts: 1,701
Default Re: Micronata low distortion generator.

I have one just like Peter’s.
It takes 2 x 4.5V batteries in series to provide 9V. Type 1289 lantern, the flat one with the 2 brass strips on top. Originally came with a plastic piece that held the batteries together and provided the series connection. The 1289 is still available, I still see them at boot sales, usually Panasonic.

Peter
Reelman is offline  
Old 18th Dec 2018, 12:50 am   #5
goughy57
Triode
 
Join Date: Jun 2018
Location: Cardiff, Wales, UK.
Posts: 21
Default Re: Micronata low distortion generator.

Thanks Peter
goughy57 is offline  
Old 18th Dec 2018, 7:22 am   #6
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,636
Default Re: Micronata low distortion generator.

With unknown power wires + ground/ - can often be ID'd by looking at the PCB if any. Ground or - neg is usually easy because the ground plane on a PCB is thicker and the most common/plentiful trace , the - neg of electrolytic caps go to it, same to a point with +, ID'd by the pos of electrolytic/tant caps and the cathode of zener's.

Where it gets tricky is when you have two batteries in series with a ground/0v and pos/neg rails.

Andy.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is offline  
Old 18th Dec 2018, 4:36 pm   #7
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 7,636
Default Re: Micronata low distortion generator.

Just to clarify by "ground/ -" and "Ground or - neg" I mean ground as in a split rail supply or the negative of the battery terminal in a single rail supply, which ever is applicable. of coarse big fat traces could be neither if PNP trannies are used.

Andy.
__________________
Curiosity hasn't killed this cat...so far.

Last edited by Diabolical Artificer; 18th Dec 2018 at 4:48 pm.
Diabolical Artificer is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 5:14 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.