08-12-2009, 04:40 PM
I have a Philco 66 on the bench. While testing the tubes, I noticed that ALL were branded PHILCO and had similar appearance and date codes. I had no luck on finding information on the web for early Philco tubes. This radio had had some servicing (volume control, line bypass cap) but was otherwise all original.
I was wondering if the tubes were the originals as shipped? All the codes are arranged vertically, with a LETTER and a NUMBER. The codes I found were (first figure on TOP) 78: 5C, 6A7: H5, 75: C5, 42: B4, 80: B4. Looks like a month (letter) and year (number) - but just guessing.
Does anyone have a reference on-line? I do NOT have Lud's book.
Thanks,
Dave
I was wondering if the tubes were the originals as shipped? All the codes are arranged vertically, with a LETTER and a NUMBER. The codes I found were (first figure on TOP) 78: 5C, 6A7: H5, 75: C5, 42: B4, 80: B4. Looks like a month (letter) and year (number) - but just guessing.
Does anyone have a reference on-line? I do NOT have Lud's book.
Thanks,
Dave
