I just get this old amp .. Could you please help me to identify this old amp ?
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Some parts that I already know (IMHO):
1. Speaker : Vintage Philips Speaker 9750 (there is a stamp "59" = "1959" .. ? ), 8 inch, 5,3 ohm, alnico magnet.
Web Reference that I get, only Vintage Philips Speaker 9710 :
http://www.troelsgravesen.dk/philips9710.htm
2. Rectifier, seems using someting like 5Y3 tube rectifier. (.. from the tube base that being used)
3. It is 2x EL84 push-pull amp . (18 watt ? )
4. From the wiring, there is still one socket tube accommodate for another El84.
(not sure, what it is for ...)
5. One 12ax7 or ECC83 type tube.
6. One mysterious Rimlock tube base (B8A) on preamp section. (is it for EF40 tube ? Philips replacement for EF86 tube ?)
7. In summary = 1x Rimlock tube base, 1x 12ax7, 3x EL-84, 1x 5Y3.
PS :
Rimlock base
The Rimlock (B8A) base is an 8-pin design with a pin circle diameter close to noval, and uses a nub on the side of the envelope to engage with a guide and retaining spring in the socket wall. This provides pin registration (since the pins are equi-spaced) and also a fair degree of retention. Early tubes with this base type typically had a metal skirt around the lower ~15mm of the envelope to match the socket wall, and this offered a degree of built-in screening, but these were fairly soon replaced by 'skirtless' versions which had a characteristic widening in the glass to compensate physically for the absence of the skirt. In the European naming scheme, rimlock tubes are numbered in the ranges 40-49, 110-119 (with exceptions), and 400-499, e.g. EF40. Although virtually unknown elsewhere, this was a very common base type in European radios of the late 1940s through the 1950s, but was eventually displaced by the ubiquitous B7G and noval (B9A) base types.
Does someone could help me please to identify this old amp ?
Thank you ..
.
