Hi folks. Short time lurker, first time poster here. Love all the great info here!
To the point, I just started working for a guy who has a fully refurbished Dyna-Quik 500. I'm definitely in need of adapters, so I'm on the hunt for those, but I pulled fuses out of an old Philco radio to test them. But the tube types aren't in the chart. As a rookie who hasn't used more than one other tube tester, this is new to me.
For example, I have a 7B7 which needs the L55a adapter, so I will have to buy that, but I also have a 7J7 that isn't in the chart. This goes for the 7C6 and 7G7 types. Do I just need an updated chart or should I just be way more technical and know what the alternatives should be?
Thanks in advance for any feedback. I really want to make the most of this opportunity and tester!
To the point, I just started working for a guy who has a fully refurbished Dyna-Quik 500. I'm definitely in need of adapters, so I'm on the hunt for those, but I pulled fuses out of an old Philco radio to test them. But the tube types aren't in the chart. As a rookie who hasn't used more than one other tube tester, this is new to me.
For example, I have a 7B7 which needs the L55a adapter, so I will have to buy that, but I also have a 7J7 that isn't in the chart. This goes for the 7C6 and 7G7 types. Do I just need an updated chart or should I just be way more technical and know what the alternatives should be?
Thanks in advance for any feedback. I really want to make the most of this opportunity and tester!
Welcome.
7B7 is a Remote Cutoff Pentode. An AM radio IF amplifier. It will distort in audio uses. 7C6 might be OK if you could find the socket but 12AV6 or half a 12AX7 may be more convenient. 7G7 could be an RF amp but is real over-kill for an AM radio. Nearly all US type starting with "7" will be loctal base.
Unless you are into a limited sub-set of tube AM radios (I had one in the shed but I got rid of it), these tubes are about no use. OK, any tube "can" amplify audio but there are usually better ways.
https://www.radiomuseum.org/dsp_searchtubes.cfm
https://frank.pocnet.net/
What do you want to do with it??? 7J7 is Loctal base, which was only used for a short time, and good sockets are hard to find. And the 7J7 is a Triode-Heptode-Converter.....WTF? This is a specific AM radio tube. The way it is pinned-out, and specified, don't encourage any other use. It is probably "based on" an older Octal type of similar uselessness (but a still-common socket).
7B7 is a Remote Cutoff Pentode. An AM radio IF amplifier. It will distort in audio uses. 7C6 might be OK if you could find the socket but 12AV6 or half a 12AX7 may be more convenient. 7G7 could be an RF amp but is real over-kill for an AM radio. Nearly all US type starting with "7" will be loctal base.
Unless you are into a limited sub-set of tube AM radios (I had one in the shed but I got rid of it), these tubes are about no use. OK, any tube "can" amplify audio but there are usually better ways.
https://www.radiomuseum.org/dsp_searchtubes.cfm
https://frank.pocnet.net/
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I recently purchased a Dyna-Jet 707; It needed work. Found this article- https://tubesound.com/bk-707-tube-tester
Purchased very nice repop 707 schema/owners manual & couple other accessories from author of above article on his ebay store.
Noticed he has manuals available for your 500- https://www.ebay.com/itm/190519135308
My experience has been good w/ Bob. I'd recommend getting that manual- It should answer your questions. Ya might also reach out to him on his website 'contact' link
Jim
Purchased very nice repop 707 schema/owners manual & couple other accessories from author of above article on his ebay store.
Noticed he has manuals available for your 500- https://www.ebay.com/itm/190519135308
My experience has been good w/ Bob. I'd recommend getting that manual- It should answer your questions. Ya might also reach out to him on his website 'contact' link
Jim