06-24-2014, 04:48 AM
Arran
There was a 16 chairside in 1935, it is the 16RX: http://www.philcoradio.com/gallery/1935a.htm#d
As to why Philco used 6A3 tubes in the 116X, 116RX and 680, you're asking a question that only someone who in the Philco R&D department in 1935 could answer, and they're all gone. I would guess that the intent was to offer something with a higher power output that what was achievable with push-pull 42s.
Although, I looked up the 42 in the NJ7P database and I see that you could get up to 19 watts out of a well-designed push-pull amp using 42s in class AB2. I also looked up the 6A3, and you could only get 15 watts max out of a pair of those in class AB1.
The 6A3 was probably something new that Philco used for the 1936 season in their high-end models. I do not know what year the 6A3 was introduced but I would guess it was sometime in early 1935.
Philco switched to the octal-based version of the 6A3, the 6B4G, in the 1937 season for the 37-116 and 37-690.
There was a 16 chairside in 1935, it is the 16RX: http://www.philcoradio.com/gallery/1935a.htm#d
As to why Philco used 6A3 tubes in the 116X, 116RX and 680, you're asking a question that only someone who in the Philco R&D department in 1935 could answer, and they're all gone. I would guess that the intent was to offer something with a higher power output that what was achievable with push-pull 42s.
Although, I looked up the 42 in the NJ7P database and I see that you could get up to 19 watts out of a well-designed push-pull amp using 42s in class AB2. I also looked up the 6A3, and you could only get 15 watts max out of a pair of those in class AB1.
The 6A3 was probably something new that Philco used for the 1936 season in their high-end models. I do not know what year the 6A3 was introduced but I would guess it was sometime in early 1935.
Philco switched to the octal-based version of the 6A3, the 6B4G, in the 1937 season for the 37-116 and 37-690.
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Ron Ramirez
Ferdinand IN
