Is this describing a blown tube, or two blow tubes?

1 What the helllll are you doing without your own basic tube tester?

Verify a tester has a socket and tests your tubes if they are uncommon.

sorted high price to low price

https://www.hifishark.com/search?q=tube+tester

accurate 151 (I have 157, gave my friend 257, gave another friend my bigger heavier, thus less portable Hickcok (it always/still does agree with my little 157).

https://www.ebay.com/itm/115853063390?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338381866&toolid=10001&customid=d7af0598-26f6-11ee-b5f5-636437633039

2. One blown, DO NOT use the equipment until blown tube replaced. More than likely 2nd tube was ok till you blew it.

3. IF only 1 blown, get a new matched pair, keep the good one as a spare untill your new matched pair arrived.

If/when a tube eventually weakens or blows (most last thousands of hours, but I check all mine, with my little tube tester, preamp and amp, bi-annually).

4. IF, again, a tube blows too soon, there is something wrong with the amp.

5. Test matched tubes you buy, test tubes when a system problem occurs, to avoid guessing.

I didn’t look at the price of that accurate 151, that’s WAAAAYYYY to high.

This one’s good price

https://www.ebay.com/itm/404295487358?hash=item5e21e38f7e:g:O1YAAOSwWQtkZmoZ&amdata=enc%3AAQAIAAAAwC1YTf3n7cizsICFH96ltWjSy%2FjSjZHMVc6qVI%2BO004Vx4SJ4jcNPtaOWNwrv2N7DlnyQNMbNoFGqN7aNIZt3XWwdEaVyTF6pwFZdu9cCAiARexi7ble7oSBvrhjHvNAcCpRuTmJgTwCgBqChO%2FQrunhLTTjcGnuDrkBYulpQU3uBYO9RETs5wwCvFdVH8j%2FvhyDp6mw6T0rIr1KwjvK1pn2nrrVbpMkIAWmgQukX4dqT7dQLxhrmFiL2sy5r0l77w%3D%3D%7Ctkp%3ABk9SR6zA3seuYg

Nice working B&K, $295

https://www.vintageaudioexchange.com/product/bk-tube-tester-model-625

Precision, says works

https://www.ebay.com/itm/266329557361?hash=item3e027a8971&amdata=enc%3AAQAIAAAA4P9sRqls6flZN9gOpG4aK8VKRs99TgL5y1aeMCtXvu5O5yazAA7wxrLDEyC22MqnAkbFb%252Flx6FKjjH1uiBqC57J1POJ3BADBcixRATSBhyzNCe47K2wR56vHHR6ezAt%252FmWC6SeL0tkgCTBMRRastnq0LqZMGqDTdHyi%252BtjPzKQisRhTJvRQMFpUj1rMw4GiECt71Z7xMwm4%252F0qi4hYOSCyVqQFXHu76nj%252F4wjQPAHe6b1Dw7Cym%252FvUb4YmHY2HoRNH%252Bkewb4JR9fYXlQtnB7oasSv7eJLM8467UxTV2cmkoS%7Campid%3APL_CLK

B&K

https://www.ebay.com/itm/145184256106?hash=item21cda7f06a:g:lkQAAOSw5YVkhlvZ&amdata=enc%3AAQAIAAAA4DwkyFAzCFRGZwShAqTaokAzrtLTEfiXAUIPx1mBGe5eldbnilLzy%2BGIs0wWjqAbhKxtYU6QI4nxAfp6FvJgUonNpNCjUYEgTfE1%2FHUJL77l6Cc%2BZv4If9VvYa8tmCs%2BHd5gx7%2B5dy9JtS5d8xAMkmvEhGz%2FS2xgpHTLxF2Nw5bvmncs7aKtD7TJnH6W9smttXEczZ8MyK48lu4knrSrOTEvDYh4q29CqmLWoJnpzs4XzMqQMBd85q%2BOvbTX0Kv5d6jDm2LTTcpuzmvBs6JjQGnMeiJJx0kinC2oTNHb8SVE%7Ctkp%3ABk9SR8bNvsauYg

Sencore Mighty Mite, Calibrated (read description)

https://www.ebay.com/itm/166229429470?hash=item26b40bccde:g:pK8AAOSwWGZkg5V-&amdata=enc%3AAQAIAAAAwEYV0EYc%2BbwEn80v%2FWsQi2RuN8Q%2BTdC5rAp0Z3t9duUVn8f9FQ0Bvcoekj%2BJ6v5abIw5LRY1nj3jI9CF%2Beh3ENWhJjtGB9VceWcFKyGby6kzIW2Koi%2F36kaIHnbKOlTksg99mN8cqUsBGB%2F5bncO3Zy7w%2BbvYYtLxsj9Ji75%2F%2FDarmkjImCRWFjVvRSMuuMT5uAcXb%2Fdu0Jij3Y%2F9CnkdbQlffTn7pkSWXpBfRz2gu8a4vinueTjBddU3wC%2BEj6uOg%3D%3D%7Ctkp%3ABk9SR8bNvsauYg

Precision

https://www.ebay.com/itm/285384079762?hash=item4272377992:g:VPsAAOSwKKVks2lO&amdata=enc%3AAQAIAAAA4L%2BzNciGaH0MjHumCzeRg%2FpUEzwDB0%2FW6j7CM%2BeRBmmYKIBZDHrSEqOGjPOZWHwjaS1g%2BYehqMn3BAcxmIc9%2FOmVYcjpVCQ%2BQXlDvRMBsK92hMCYsVRgetA4JFUV97KlrkxondR4Wa2lKQ7VgNDBTHx09GADSUNGlQNm%2FrL2VL2IDSo3q5O0jlfFlqhCcLHopljnq3a%2F6j%2B%2B6czzzkRO9Kk8SxV2azF5bC4um4t9XfRNi1OhYgUlN04tXrP9wtL0g8%2BA%2BtnhcJMM2g0N2ihl8F6%2FZNbzmu4II84BIQMN4AUh%7Ctkp%3ABk9SR8zNvsauYg

ANKO, working

https://www.ebay.com/itm/364352890739?hash=item54d51fe773:g:5egAAOSwdkZkZaPR&amdata=enc%3AAQAIAAAA4LJwBBvxsVp%2FnIqZSamNcLBuGnrL6%2FvVzqKnwtqGz3S6DhEz4VFtGOvoe6A426c23OfJLG928jv44%2FgAnoKZ17T3YW6ODF7ZSN9dlc1gIckfskoTvZs6XWtZRnp03J%2Bj1BkEWJdBamI20BfT2uYMXQCIMA3xOIqjGs4WXBolYZfS%2FUWTbXE05DbzVXeR5X935TXMEjqnyLSTIcMDlXVXgaXCtciI4cQqANqLbYsjjoSoM1UekslnX3w1YsN0hR3YG8pzOCYc4HDvqKREDmpExmtEKDpugp2vLNio0g4eNQde%7Ctkp%3ABk9SR9iWmceuYg

EMC,

tony,

yes, I always post things that other's as well as OP might find interesting, and finding out about stuff is fun.

I have hundreds of tubes, two of the GE Orange and Gray Porrtable Cases repair men brought to the home, and a few drawers full, a mix of used and new.

I test all my active tubes bi-annually as a matter of course, test any from my drawers of tubes when needed for me or my friends, test my friends tubes, test tubes I order.

Like an inexpensive sound pressure meter, they do not need to be 'calibrated' to give you 'relative' answers. If two tubes show the same strength on the meter, they are in fact equally strong, a bit more or less irrelevant unless close to bad.

My Hickock was calibrated by the tech who sold it to me. My little Accurate 157 always closely matched the Hickock. When I got the Accurate 257, both 157 and 257 matched, I preferred the smaller one because my first wife got it for my birthday way back when. 257 is quite portable as well.

looks like a nice working tube tester

https://www.ebay.com/itm/235096595620?hash=item36bcd95ca4:g:J1cAAOSwCkBkuK2A&amdata=enc%3AAQAIAAAA4KiTwMN%2FICgcCo8Q3d0NwCW0%2FdhhhfvxQ6lc1vxp2HG5voMLkY9%2BCkKOCQh2LJ1N9IBqO1W2Bi7ti9ojMSx1OhpYBxWBWXv%2FLH3dcynseibS6mDLHwpvKVVV9Jp1EmPXyrqD9Yw9aDueLYgjtXLX9%2FT7cTnUmGme1g5CCxKUvxXkBymMtkgZOOul%2F1usRQJ9ZJxcKNp0%2Bbv9YcmEjKL673FQCgz7inO1Yh%2FZ1rF6V9hl5tQaFGdNYqfFfrerYJI4ycXP%2F3UbKrObpBF%2FbtIUpeivxoyJynoeBRaZcqUvR6c5%7Ctkp%3ABk9SR9qam9yvYg

auction, no buy it now price