Philips Philetta special B2D14U does anyone have one of these I'm going nuts - UK Vintage Radio Repair and Restoration Discussion Forum

trabant · 27th May 2019, 5:06 pm

About two years ago shortly before the previous Mrs Trabant left me for a 22 year old who didn't collect old rubbish I bought this philetta special which at that point worked but kept overheating its output valve. I set to work fixing that and replacing the smoothing caps then the proverbial hit the fan with the girlfriend and the Philips got boxed up. Anyway I have dug it out but I haven't got a clue where to to connect a couple.of components and could use a couple of pics of a good chassis. Basically the schematic shows R1 connected across part of the output TX on the layout but on the schematic it's not it's connected to one of the smoothers at one and and the output TX at the other now the output TX has three connections one side and four the other on the layout it has four each side I'm stumped ! If I connect it across it it's going to the same connection as the output valve and a 1500pf cap this gives me HT but one hell of a hum and very weak stations and no volume not connected I get no HT and no sound at all .

ms660 · 27th May 2019, 5:59 pm

R1 isn't connected across the output transformer winding in the manuals layout, it's connected between a tag which is one end of the primary winding and another tag on the transformer which is tag that's isolated from the windings, in other words that other tag is a feed point to C2/HT out, as per the schematic.

Lawrence.

petervk2mlg · 28th May 2019, 10:10 am

Here is an extract from the circuit.

27th May 2019, 5:06 pm	#1
trabant Retired Dormant Member Join Date: Mar 2010 Location: Carlisle, UK. Posts: 164	Philips Philetta special B2D14U does anyone have one of these I'm going nuts About two years ago shortly before the previous Mrs Trabant left me for a 22 year old who didn't collect old rubbish I bought this philetta special which at that point worked but kept overheating its output valve. I set to work fixing that and replacing the smoothing caps then the proverbial hit the fan with the girlfriend and the Philips got boxed up. Anyway I have dug it out but I haven't got a clue where to to connect a couple.of components and could use a couple of pics of a good chassis. Basically the schematic shows R1 connected across part of the output TX on the layout but on the schematic it's not it's connected to one of the smoothers at one and and the output TX at the other now the output TX has three connections one side and four the other on the layout it has four each side I'm stumped ! If I connect it across it it's going to the same connection as the output valve and a 1500pf cap this gives me HT but one hell of a hum and very weak stations and no volume not connected I get no HT and no sound at all .

27th May 2019, 5:59 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Philips philetta special B2D14U does anyone have one of these I'm going nuts R1 isn't connected across the output transformer winding in the manuals layout, it's connected between a tag which is one end of the primary winding and another tag on the transformer which is tag that's isolated from the windings, in other words that other tag is a feed point to C2/HT out, as per the schematic. Lawrence. Last edited by ms660; 27th May 2019 at 6:13 pm.

28th May 2019, 10:10 am	#3
petervk2mlg Heptode Join Date: Jan 2007 Location: Parkes, NSW Australia Posts: 877	Re: Philips Philetta special B2D14U does anyone have one of these I'm going nuts Here is an extract from the circuit. Attached Thumbnails