Precision Tube Testers
Precision 660 Tube and Transistor Tester
Here's a picture of my Precision 660 ... this is different from all other 660s I've seen in that it has more transistor and tube sockets. I refurbished the case, since the original cloth-like covering was very tatty. To do this I removed all the material, sanded down the surfaces, and applied three coats of Danish Oil.
More pictures here, including showing the instrument testing a 6SN7GT dual triode: (click on thumbnails for larger versions)
Here is some 660-specific information:
Other Precision Tube Testers
(This is a collection of images of Precision Tube Testers from around the Web, Ebay, etc..)
| Model | Photograph(s) [Click for large version] |
| 10-12 |
    
|
| 10-15 |
 |
| 10-40 (Russ Ingalls) |
 |
| 10-54 |
 |
| 245 |
 |
| 400 |
 |
| 467 |
 |
| 612 |
    
|
| 614 |
 |
| 640 |
    |
| 650 |
  |
| 654 |
  |
| 660 (First two images are of my own 660, which is unusual in having more sockets than other 660s here) |
    
|
| 607 (B&K Precision) |
 |
| 667 (B&K Precision) |
  |
| 800 |
 |
| 856 |
 |
| 98 |
 |
| 910 |
    |
| 912 |
    
|
| 915 (3rd. is Dom Scolaro's 915) |
   |
| 920 |
    
|
| 954 |
    |
| 960 |
 |
| EV-10 |
 |
| CR-30 |
 |
| SS-10 |
 |
| T-60 |
   |
| T-61 |
 |
| A-15 (adapter) |
  |
| G-140 (adapter) |
  |
Links to information on Precision Tube Testers:
- http://users.iglide.net/hworth/radio/precision.html (includes data sheet and schematic downloads)
- http://members.tripod.com/~mjman/tubetesters.html
- http://bama.sbc.edu/paco.htm (manuals for PACO/Precision Tube Testers)
- http://www.nostalgiaair.org/References/Manuals/ (manuals for 10-12, 10-15, 612, 614 Precision Tube Testers)
- http://www.tubefreak.com/tubestesters.htm (various Precision and other brand testers)
- http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Roe-Pruefer/Precision-954/954.htm (in German: 954 information)
Mike Wiles' Precision 660
Here is a photo of Mike's beautifully restored 660:
