Philips F6X95A Tube Radio Chassis Restoration pt. 2 – We have more progress than expected.



After the testing of the power supply, I follow on to the audio section, including the preamp and power amp stages. These are quite straight-forward on this set, …

21 Comments

  1. Back in the days a company, i think it was RCA patentet 450kHz (yes, possible back then) so most manufacturers used some other to avoid paying the fee, thats why so many older radios have odd if frequencies.

  2. Hello again Manuel. This nice old radio is coming along nicely. My father had a Philips radio similar to this, I may be wrong but I seam to remember that the third light that is flashing has something to do with the fine tuning. I hope you get this radio to perform well, as they do sound good. Enjoying this series (as I do all of them). Stay safe. Cheers Chris.

  3. Nice work. I'm surprised that such a deluxe radio, with stereo amplifier, is lacking FM. The AM section on the other hand, is something extra with many SW bands and almost full coverage of entire SW plus an RF amplifier. Must have good sensitivity and should provide decent image rejection. On an average broadcast receiver image rejection is often next to nothing on SW.
    The speaker connectors look like the ones used in Philips 800 ohms sets without output transformers, often with two EL86 valves. But this radio have output transformers.

  4. Hi Manuel!
    I think these contacts that switches on the bandspread section on the dial, are markers that lets you know youre in the center of a commercial band on shortwave, and when this light is on, it is the optimal place to use the bandspread.
    Great to see the radio working so well!
    Whishing you all the best,
    Moshe.

  5. Tube equivalency, this is more of a question but I assumed that Phillips would design tubes for their own purposes, and RCA the same considering that tubes are basically made of the same components there should be equivalencies between the two different manufacturers have people worked out cross reference guides?
    The Germans and Portuguese made sets seem to use a standard set of tubes and in this segment I thought you might be cross-referencing some of those valve numbers.

  6. Just think that the equipment used in the alignment of those fabulous radios of the 1950/60s was not as hi~tech as to day and yet those manufacturers produced some of the Finest Quality radios all European Saba, Grundi , Philips , Telefunken etc , Thank you for giving a new lease of Life ,{ Had to get that off my chest }

  7. When you look at the schematic, you'll find the switching for the third dial lamp at the bottom, next to the EM84.
    It is an indicator when you hit the 11m, 13m, 16m, 19m, 25m and 30m band. Then you can use the bandspread to fine tune withn that band.

  8. That issue with the light on the bottom is about to drive me batty! I really want to know what is going on with it…as you do too. Will be quite interesting to see what the issue is. This has been, and I am sure will continue to be a very interesting radio and series of videos.
    On the issue of changing the resistors that were only 10% out on 20% resistors, I have NO problem with you doing that. In fact, if you chose to go to 1% resistors it would be fine with me. I fully realize that circuits will work with a larger tolerance, but if you can get it to the "exact" value, why not? I think this would be most important in test equipment, things like tube (valve) testers, scopes, etc.
    I look forward to your getting the two channels equal in amplitude and doing a full alignment.

  9. Ecc83. That's quite a late model I assume?
    Btw negative feedback also improves the amplifier damping factor.
    It doesn't lower the total power delivery per se , just the gain.
    But I think that's what you meant to say.
    Great video! 👍🏻

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