Till Eulenspiegel

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Forum Replies Created

RE: Ekco T344F

Circuit of the IF stages and video amplifier, Ekco T344F. Attachment : Ekco_T344F_Video_ccts.jpg Till Eulenspiegel.

In forum Black & White Television

4 days ago
RE: Manufacturing your own PCB

I understand the BBC digital 625 to 405 line converter PCB artwork was made in a similar manner. Till Eulenspiegel.

In forum General Technical Discussion

4 days ago
RE: Ekco T344F

If an oscilloscope is available check the quality of the video waveform at the grid of the video amplifier valve, there shouldn't be any sync crushing. Also, the shape of the sync pulses at the anode ...

In forum Black & White Television

4 days ago
Manufacturing your own PCB

I doubt if anyone would go to trouble of making a complex printed circuit board by using the old method of laying on pieces of crepe material on the grid pattern. sheet. Made sometime in the late ei...

In forum General Technical Discussion

4 days ago
RE: Ekco T344F

Back in the days of 405 line TV I did prefer in some situations receivers with flywheel sync, not so much for ragged vertical caused by noisy signals but rather to smooth up the picture when receiving...

In forum Black & White Television

5 days ago
RE: Ekco T344F

Should be a simple task to change to direct sync. Short circuit the grid of the control valve V20A direct to chassis and connect a small value capacitor, say 10pF, between the anode of the sync sepa...

In forum Black & White Television

5 days ago
RE: Another Superinductance radio.

Last post about this set was in 2013. I've given up with the idea of rebuilding the 274A chassis. Instead, a rather special Philips chassis has been found to go into the cabinet. It's a chassis fro...

In forum Radio

1 week ago
RE: 1974 20" Ferguson 3C03; Thorn 4000 ; Super Rare

Usually 0.1 inch spacing (2.54mm) for the PCB artwork grid reference. Although stating that I find the pitch on the BRC 2000 edge connectors is 4mm. Till Eulenspiegel.

In forum Colour Television

1 week ago
RE: Defiant 7A91

Unlikely Philips would have badged a Plessey TV set although it has to said in the mid-sixties TV sets with the Cossor and Peto-Scott brand names were made and sold with the Plessey dual-standard chas...

In forum Black & White Television

1 week ago
RE: New addition, Baird M708

Hi Gary, absolutely excellent results. I want one. This is the model I considered before buying the GEC 2028 in 1968. Till Eulenspiegel.

In forum Colour Television

3 weeks ago
RE: Another Philips line output transformer substitution, model 19TG108U.

The scanning coils in presently in use can be fitted with a linearity sleeve. To check the activity in the PL81 a 1 ohm resistor will be inserted between the cathode and ground. This will allow oscill...

In forum Black & White Television

4 weeks ago
RE: Another Philips line output transformer substitution, model 19TG108U.

The flyback tuning capacitor changed to the original value of 180pF. EHT is now 15.5KV but still too much picture width even with the width control on the minimum setting. The three 75 ohm resistors i...

In forum Black & White Television

4 weeks ago
RE: Another Philips line output transformer substitution, model 19TG108U.

Earlier today the EHT was measured and found to be 13KV. Easily get away raising it to 15KV. Guess that is highest safe figure for the AW47-90 CRT final anode. Till Eulenspiegel.

In forum Black & White Television

4 weeks ago
RE: Another Philips line output transformer substitution, model 19TG108U.

Results from yesterdays work on the set, a picture with excessive width.Today, the EHT voltage will be measured and if it isn't too high the value of the flyback tuning capacitor will be reduced. That...

In forum Black & White Television

4 weeks ago
RE: Another Philips line output transformer substitution, model 19TG108U.

The replacement line transformer was fitted this afternoon. Also all the wiring done as well. The line linearity coil is retained as it was in the 21" Stella. Provision for an alternative line output...

In forum Black & White Television

1 month ago
Another Philips line output transformer substitution, model 19TG108U.

Like my previous line transformer substitution in a Philips TG100U type of TV receiver the replacement transformer will be a BRC 1500 jellypot. The line oscillator has already been rewired as multi-v...

In forum Black & White Television

1 month ago
RE: Servicing The FireBall Tuner

The Fireball tuner in the HMV 1920 employs a PCC89 frame grid valve as the RF amplifier. Frequency changer is a PCF80. Till Eulenspiegel.

In forum General Technical Discussion

1 month ago
RE: Rediffusion MK7

In the USA the 110degree CRT was introduced in 1957. Nevertheless, in the UK Pye was quick of the mark late 1958 with a 17" portable TV set, the PV110. The developer of the 110degree CRT is unknown to...

In forum Black & White Television

1 month ago
RE: Servicing The FireBall Tuner

There was a version of the Fireball tuner which incorporated coils for FM radio reception. Used in the Pam model 551FM. The tuner has an extended shaft to which the cam that operates the FM/TV switc...

In forum General Technical Discussion

1 month ago
RE: Rediffusion MK7

In the 17" Mark 7 aerial receiver the the press-button tuner was situated on the front panel. Whatever type of tuner you wish to employ in the 19" model it could be attached to the front panel along ...

In forum Black & White Television

1 month ago
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