In today's economy it's crucially vital to get the most you can for your purchasing dollar. So there's no sane reason to over pay for Amperex Tube when there are 1000's of them for sale on eBay. Plus, eBay is one of the leading and most trustworthy online shopping sites in the entire world. This site is approved by eBay to help you find the Amperex Tube you are hunting for and show them to you. If you don't see the Amperex Tube you are hunting for below. Use the search feature on the right to find the style you want.
 EL84 Mullard 7189 US $10.25 
|
 EL84 Amperex & Valvo EL84 US $2.75
|
 El84 Amperex EL84 pair US $45.00
|
 TUBE AMPLIFIER SCHEMATICS DIAGRAMS AUDIO BOOKS + TUBE DATA ON 2 CD US $19.95
|
How do I test a 4-400 linear amplifier tube??
I have a Johnson Viking Thunderbolt linear amplifier. Recently the bias transformer blew up. I replaced the transformer , but now screen bias voltage and grid voltages are below normal.
When I remove the 4-400 bias voltages get back to normal.
The tubes I'm using now are new Eimac Jan 8438 . But the problem happens also with old Amperex 8438. The voltage regulators VR-150 and VR-105 are new units.The rectifiers were tested and found ok. Is there a way to rest my 4-400 tubes without substituting them (I dont have extra tubes) ?if you need more info on this question to give a precise answer let me know.
Unfortunately the only way to truly test a transmitter tube is while transmitting. If the same thing happens with 2 different tube, I would suspect it is not the tube(s). I would recommend you post the question on the Elmers Forum of eham.net and see if anyone there can help you out. Good luck.
Whats On My YouTube Today?
Phaez JTM18 + Boost/Scumack H75 - Scumnico/ Zhangbucker Duanebucker pickups
Here Are A Few Items From Amazon You Might Be Interested In.
| Account limit of 2212 requests per hour exceeded. |
Items recently purchased on this site:
2 Vintage Fisher Amperex 12AX7 ECC83 Stereo Tube p2, 3000 WATTS AUDIO AMPLIFIER AMPEREX 891-R TRANSMITTING TUBE FORCED-AIR COOLED , 5AR4/GZ34 AMPEREX TUBE 5AR4 BUGLE BOY, Eimac/Amperex 4-400 RF Power Vacuum Tubes, 4 AMPEREX O AND D GETTER 6BQ5 EL84 TUBES !!, AMPEREX INDUSTRIAL VACUUM TUBE 12-58 "FREE SHIPPING", 2 pcs. Amperex Bugle Boy logo EL84/6BQ5 audio tube - same codes, AMPEREX PQ 7788 VACUUM TUBE 1968 O GETTER MATCHED PAIR GOLD PIN SWEET TONE1, AMPEREX PQ 404A 5847 PREMIUM QUALITY GOLD PIN Amp Pre Amp Vacuum Tube NOS NIB, 3 Rare Amperex EL84 6BQ5 NOS NIB made in Holland Tubes , amperex cv 26 RARE, Tung Sol 12AX7 ECC88 Pair Tubes Hickok 539C Tested Guaranteed HT129, Four NOS Valvo / Amperex ECC85 6AQ8 Tubes, VINTAGE PRIMO NOS AMPEREX 6GH8A TUBE FRANCE NICE LOOK!!!!!!!!!!!!!!!!!!!!!!!! , One 1966 Amperex/Arcturus 7025 (12AX7 / ECC83) tube - New Old Stock with Box, One 1967 Amperex/Arcturus 7025 (12AX7 / ECC83) tube - New Old Stock with Box, One 1967 Amperex/Hytron 12AX7 (ECC83) tube - New Old Stock / New In Box, 2 matched 1966-67 Amperex/Hytron 12AX7 (ECC83)tubes - New Old Stock / New In Box, NOS Amperex Gray Plate O Getter 6463 Tube, PAIR NOS NIB Amperex Holland 12AX7A Audio Tubes Test 114%, 1961's Matched Pair Amperex Hammond 12Ax7/ECC83 Strong Tubes Made In Holland , Matched Pair Amperex HEWLETT 12Ax7/ECC83 Strong Tubes Holland , Matched Pair Amperex- 6DJ8- Strong Vacuum Tubes Made In Holland, 12AX7A Amperex Blackburn Matched SET (2) NOS Vacuum Audio ECC83 Vintage Tube NOS, ECC82 12AU7 Amperex made in Holland Bugle Boy Quad (4) NOS NIB , Vintage Amperex ECF80 6BL8 Gold Pin Stereo Tube Germany, Vintage Fisher Amperex 12AX7 ECC83 Stereo Tube "I65", 12AX7A Amperex Blackburn Matched SET (3) NOS Vacuum Audio ECC83 Vintage Tube NOS, Bugle Boy 12AU7 Tube, 6 Vintage Amperex PQ E80F 6094 Tube Amp Amplifier , Trio Of AMPEREX 6922 Premium Quality, Gold Pins, USA Made. Test Strong!!, Mullard/Amperex 12AT7/ecc81 - quad -Blackburn, Pair of Vintage AMPEREX 6DJ8 ECC88 Vacuum Tubes Holland, 6 AMPEREX 6DJ8 ECC88 Amplifier Tubes NOS with Orig Boxes, 2 AMPEREX 6DJ8 ECC88 Amplifier Tubes with Orig Boxes, 2 AMPEREX 12AX7A Guitar Amplifier Tubes NOS with Boxes, Vintage Browning Laboratories FM Multiplex Receiver - Tube 6V6 ( amp ), FOUR NOS VINTAGE AMPEREX 6DJ8 ECC88 PRE AMPLIFIER TUBE, Tube 6DJ8 USED Tested OK Lot of 4, A VINTAGE AMPEREX BUGLE BOY 12AT7/ECC81 VACUUM TUBE, (2) Amperex 6085 E80CC NOS tubes, matched date codes pair, gold pins, PQ, 6L6GC Amperex tube - Tests good.. Nice in original box , Vintage H.P. Amperex Holland 12AU7 ECC82 Stereo Tube, Amperex PQ 6922 Matched Pair, Made in USA, Amperex Philips E88CC SQ 6922 - MINT NOS NIB Matched Pairs 1971 Heerlen Holland , Philips SQ E88CC 6922 Heerlen Holland 1963 matched pair Amperex tubes valves, AMPEREX 6201 12AT7 ECC81 VACUUM TUBE MATCHED PAIR GERMANY GOLD PIN DIMPLED GETTR, AMPEREX ORANGE GLOBE 12AT7 ECC81 VACUUM TUBE W. GERMANY SWEET TONE, AMPEREX ORANGE GLOBE 12AT7 ECC81 VACUUM TUBE MATCHED PAIR W. GERMANY SWEET TONE4, AMPEREX ORANGE GLOBE 12AT7 ECC81 VACUUM TUBE MATCHED PAIR W. GERMANY SWEET TONE3, AMPEREX ORANGE GLOBE 12AT7 ECC81 VACUUM TUBE MATCHED PAIR W. GERMANY SWEET TONE2, AMPEREX ORANGE GLOBE 12AT7 ECC81 VACUUM TUBE MATCHED PAIR W. GERMANY SWEET TONE1, Vintage HP Amperex Holland 6DJ8 ECC88 Stereo Tube, Amperex 5894 Made In Holland, Pair Amperex 8416 Vacuum Tubes Gold Pins TV-7 Tested., Vintage Amperex Electron Vacuum Tube 6GY6/6GX6 NOS, Amperex 12AU7 ECC82 Holland Orange Globe Used Good #T94, 2ea) Telefunken / Amperex ecc82/12au7 Radio Vacuum Tubes, Amperex PQ 6922 Made in the USA Single Tube, Amperex PQ 6922 Made in the USA,
Thanks for visiting!
Tags: tube, brimar, cd, audio, amperex tube manual, amperex tube codes