Nice chart of Octal sweep tubes

[Opcom]

a pdf file, most types as of 1957 will be octal, and more or less inexpensive since they weren't used up by the CB crowd.

[MikeKE0ZUinkcmo]

Thank you Pat for the information, it's in the errata note book.

[WQ9E]

That is useful Pat, thanks for posting.

The higher filament voltage tubes deserve a second look because they should be in less demand and lower priced in both the octal and compactron bases making them attractive for homebrew projects.  The would also be a reasonable choice in commercial ham gear where the matching power supply is often missing and expensive so when building a replacement it would be easy to include a higher voltage filament supply for the finals.

Rodger WQ9E

[DMOD]

Not shown are the higher power tubes (which came a bit later) such as the venerable 6DQ5 and 6LW6.

[km6sn]

In Sep 64 issue of 73 magazine there is an interesting article about 6DQ5 differences
by brand
https://worldradiohistory.com/Archive-DX/73-magazine/73-magazine-1964/73-magazine-09-september-1964.pdf

[w4bfs]

look at various mfgrs 6DQ5 .... comparing plate construction to a 6JE6 .... most are about the same size with some bigger more like 6KD6 .... seems bigger than comparable 24 Watt tubes .... this still is not definitive and since all tubes are now scarce and getting expensive probably better to stay within ratings ... otoh some audio guy pushed a 6LW6 to where he got a red plate .... 90 W!   

[Tom WA3KLR]

 "probably better to stay within ratings" - One of the wisest things I've ever read on the AM Forum.

[w4bfs]

thanks anyway Tom .... don't confuse me with one of those