pucho812

Re: Simple Tube Tester?
« Reply #20 on: February 13, 2018, 12:28:40 PM »
if you choose to buy a used tube tester then make sure it comes with the book for the tester. my two tube testers would be useless without their respective book telling me what settings  get adjusted for which tube and which socket to use. 
Every mic has a purpose it might be a door stop or a hammer, but every mic has a purpose.


bibi

Re: Simple Tube Tester?
« Reply #21 on: February 14, 2018, 03:36:23 AM »
I've been considering this one on Ebay--  there are also English instructions that are clearly written if you ask for them.  I like the fact that I don't need to hook up a computer although I do believe there is a tracer function add on for those that need one. 

https://www.ebay.de/itm/VACUUM-TUBE-TESTER-FULL-KIT-WITH-LCD-DISPLAY-KIT-LAMPEMETRE-DIGITAL-COMPLET/262023069804?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Any thoughts? 

rackmonkey

Re: Simple Tube Tester?
« Reply #22 on: February 14, 2018, 12:31:05 PM »
I've looked at this before. Looks interesting. But MattC said in an earlier post said he asked the vendor/maker of the Utracer (a seemingly similar device) about fault testing, and the guy said that it's not suitable for that. No capability to look for shorts, gas, etc. Just a tool for measuring cathode strength and gM/tracing. I used Google Translate to get the description of this one in the eBay listing, and it looks like it's probably in the same  boat.

But if that's what you're looking for (matching tubes, testing known good tubes) then it may be just the ticket.

Google translation:

Complete kit of high performance digital tube tester, wired, set, ready to use.

This kit consists of a main board shown in picture 2 and a set
peripheral elements pre - wired with the power sources shown in photo 3.

Features and performance are vastly superior to the overall
traditional tube testers and measure a very wide range of tubes.

The first picture shows the assembled unit, picture 3 shows the set of connectors
with pre-wired control elements + power supplies.

Full documentation on request by giving me a valid e-mail address.

Summary of features:

Module dimensions: 146 mm x 133 mm maximum height 28mm + backlit LCD display
25 x 70 mm.

Single power supply: 110/230 V or 12V battery via a converter
optional.

Power Consumption: 25W (35W max.) On mains and about 2A on 12V battery

Voltage, Plate: adjustable from 0 to 450 V

Screen voltage: adjustable from 15 V to 350 V

Grid voltage 1: 0 to - 100 V (by potentiometer 10 turns)

Current range: 0 to 300 mA in 2 automatic sub-ranges: 0 to 34.0 mA
(0.1mA resolution) then 34 to 300mA (1mA resolution)

Short circuit protection: total
(NOTE: this is not the same as short identification. BT)

Overall accuracy: +/- 5% +/- 1 digit

Note: These values ​​are real, the use of a microprocessor allows an ultra-fast measurement mode
which minimizes the power required. Few traditional tube testers are
capable of such measures because they require heavy and bulky power supplies -
the famous Metrix 310, for example, is limited to 100 mA of current plate.

The operation of the device is very simple: it is sufficient to adjust, via 3
potentiometers, anode voltage, screen voltage (for tetrodes, penthodes, etc ...)
and the bias voltage gates to the desired values ​​and, simultaneously, the corresponding plate current is displayed on the LCD screen.

The measurements are carried out at the rate of 2 per second, which enables continuous reading.
parameters and results.
Whether you think you can or you think you can't, you're probably right.

Re: Simple Tube Tester?
« Reply #23 on: February 14, 2018, 03:31:07 PM »
Brimar Bob was making one for commercial release don't know if it's done yet?

http://brimaruk.com/valve-testers/