I just pulled these from an old amp of mine (not guitar), any idea what they are?
Thank you very, very much. I don't have a need for EL84 tubes so I guess I need to get these tested and then sell them. I will test the 12AX7 tubes though as I could use them.Originally posted by Reeek
Sure, it "appears" yo have a 6CA4 rectifier tube, An Amperex Bugle Boy 12AX7, Not sure what the sonio is but it may be a lower gain preamp tube that appears to be vintage USA made but rebranded, and two Amperex EL84's which are Bugle Boys too.
Amperex Bugle Boys are considered by many to be the best Amperex tube made. Most likely made in Holland but sometimes you'll find a Made in Britain Amperex which would likely be a Mullard manufactured tube. I won't try to go into how they rate aganist some of the benchmark vintage tubes such as Mullard because tone is subjective but if those tubes are tested at a high level, they are nice tubes and worth maybe $25-$35 each foe the EL84's, maybe more if they test new.
The Amperex 12AX7, if tested new could fetch you $20 - $35 on eBay too.
The 6CA4 is a cheap tube moneywise as are most rectifier tubes but it looks like a Mullard as depicted by the worn off Mullard label but 9 pin Mullard ube such as that and the EL84's tend to have the sooty deposits from the factory burn in which has no ill effect at all on their perfromance. A guess on the unmaed preamp tube is a GE or Slyvania without pictoral reference with me.
On the two Amperex EL84's they both have a "rX2 D7H". (this one is visible in the pic, last tube near bottom of glass)Originally posted by V846
Does there appear er can you read any codes etched in the glass?
I have called all those AND the numbers they gave me to try. Two of them were actual TUBE AMP repair shops! I may not have enough knowledge to make this claim, but it seems to me any DECENT amp repair shop would be able to test tubes. Is this a correct statement?Originally posted by Reeek
Not even at a TV/Radio/Stereo repair shop?