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Details about  Quad Tube Audio Amp Bias Probe Tester 6L6 EL34 KT88 6V6

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Quad Tube Audio Amp Bias Probe Tester 6L6 EL34 KT88 6V6
Quad-Tube-Audio-Amp-Bias-Probe-Tester-6L6-EL34-KT88-6V6
Item Sold
Item condition:
--not specified
Ended:
Jun 02, 2013 14:33:21 PDT
Price:
US $46.95
[
History:
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Shipping:
$15.00 Standard Shipping | See details
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Item location:
Hong Kong, Hong Kong

Description

eBay item number:
290679646702
Seller assumes all responsibility for this listing.
Last updated on  Apr 30, 2013 05:59:49 PDT  View all revisions

Item specifics

Type:

telephones

 

                               Please read the description carefully before you buy.

                                      BE  A  SMART CONSUMER

  

                 DO NOT LET OTHER SELLER MISLEAD YOU.

    The reading shown on the bias is in current (ma) which is better than those show reading in voltage (it does not need to convert from voltage to current. )

So far, over 500 of this item have been sold and no one complains about the accuracy of it.

You should make a clever choice.

 

You are bidding on a Quad amp tube bias Tester with one pair (2pcs.) Normal type probe cables only.  (It is detachable). You have an option to purchase a pair Special type 8-pins probe cables( for 7591,7591a.7355 ) or 9-pins probe cables For EL84, 6BQ5,7189 .

The price $30.00 for a pair 9-pins probe cables.( EL84 ,6BQ5,7189 )

The price $30.00 for special type8-pins probe cables.( 7591 ,7591A.7455 )

 

After you make a purchase and make payment, please advice me, if you want the full configuration, and I will send you a separate paypal invoice for the extra probes.

 

 

 They will cover 9 pin EL84,7189,7189A,6BQ5, tube types as well as most 8 pins octal including EL34, 6L6GC, 6V6GT, 5881, 6550, KT-66,KT88,7027,7027A, KT88's.

For the future, you can use this Tester for other type tube probe cables.

 

you can get the reading direct from the current meter. It does not need any convert from mV to mA. It can be work with all kinds of multi meter (Digital meter or analog pointer meters) , at range of 100mA or above.

 

It is a safe, risk free meter, it measures the cathode current

of the power tube for bias reading (at low voltage side of the tubes ).

 

 

Steps to check the bias of your amplifier:

1.    Turn off and unplug your amplifier.  Make sure your multi meter works properly (the fuse of meter inside the meter has not burn off  )

2.    Remove the power tubes to be checked.  If the amplifier has been used recently the output tubes will be HOT.  Allow the amplifier to cool down prior to removing the tubes.

 

3.    Insert bias meter probes into the tube sockets of the amplifier. 

 

4.    Insert the power output tubes into the bias probe sockets.

 

5.    Turn on your power amp and let the tubes get warm (3-5 minutes) read the bias measurement. (As shown on the picture).

 

6.    Move the switch from “A” to “B”or “C” , “D”.    The reading should be no more than 2 or 3 milliamps difference for a good balance between the tubes.  At this time you can adjust the current level (using the amplifiers bias adjustment control) to the appropriate level.  There are many charts online that will give you the proper range of current for your tubes.  Do not exceed the maximum level on these charts or you will damage your tubes.  If you see a red glow in your tubes turn the amplifier off immediately.  One possible reason is the bias current is too high.

 

7.    After you have completed checking the bias on your output tubes turn your amplifier off and allow it to cool down.  Again, the tubes will be very HOT at this time.

 

8.    Remove the bias probe sockets and re-insert the output tubes.

 

9.    You are now ready to rock and roll!

 

This procedure should not take more than 15-20 minutes.

 

 

 

While you pay please make a note to confirm it which configuration (8-pins or 9-pins) probe cables do you want. ( If you do not make a note to confirm it ,i will send you a pair normal type 8-pins probes )

 

                                                                                 

 

 

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