No playback from my Stellaphone ST451 - UK Vintage Radio Repair and Restoration Discussion Forum

PowerMac_G4 · 23rd Apr 2017, 3:07 pm

Hi all,

I recently picked up a lovely 'little' Stellaphone ST451 from 1959, it's neat! However I am having a little problem; every function appears to work flawlessly apart from reading audio off the tape. It feeds and plays fine, but no audio. The valves are all glowing and the speaker hums, but I'm at a dead end. I've fiddled to no avail but this is verging on being outside of my comfort zone. Any help the folks here can provide would be greatly appreciated, as resources online are basically non-existent for this machine.

Thanks in advance,

PowerMac_G4

TonyDuell · 23rd Apr 2017, 5:57 pm

There's an entry in the radiomuseum here :

http://www.radiomuseum.org/r/stella_...one_st451.html

which might be a starting point.

vidjoman · 23rd Apr 2017, 8:09 pm

Probably more info on the Philips version.

Steve_P · 24th Apr 2017, 5:54 am

This is a Philips EL3527 in disguise....

http://www.radiomuseum.org/r/philips_el3527_00.html

Note that payback occurs with the green light (DM70) off. If it has those black waxy capacitors on the circuit board then change the lot. No messing....

Check the head connections and the rotary switch. This can be a root of many evils.

Cheers,

Steve P.

Station X · 24th Apr 2017, 9:21 am

Service information can be downloaded here:-

http://www.service-data.com/product....70/6070/a14770

23rd Apr 2017, 3:07 pm	#1
PowerMac_G4 Retired Dormant Member Join Date: Apr 2017 Location: West Midlands, UK. Posts: 1	No playback from my Stellaphone ST451 Hi all, I recently picked up a lovely 'little' Stellaphone ST451 from 1959, it's neat! However I am having a little problem; every function appears to work flawlessly apart from reading audio off the tape. It feeds and plays fine, but no audio. The valves are all glowing and the speaker hums, but I'm at a dead end. I've fiddled to no avail but this is verging on being outside of my comfort zone. Any help the folks here can provide would be greatly appreciated, as resources online are basically non-existent for this machine. Thanks in advance, PowerMac_G4

23rd Apr 2017, 5:57 pm	#2
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,208	Re: No playback from my Stellaphone ST451 There's an entry in the radiomuseum here : http://www.radiomuseum.org/r/stella_...one_st451.html which might be a starting point.

23rd Apr 2017, 8:09 pm	#3
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,325	Re: No playback from my Stellaphone ST451 Probably more info on the Philips version.

24th Apr 2017, 5:54 am	#4
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: No playback from my Stellaphone ST451 This is a Philips EL3527 in disguise.... http://www.radiomuseum.org/r/philips_el3527_00.html Note that payback occurs with the green light (DM70) off. If it has those black waxy capacitors on the circuit board then change the lot. No messing.... Check the head connections and the rotary switch. This can be a root of many evils. Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

24th Apr 2017, 9:21 am	#5
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,287	Re: No playback from my Stellaphone ST451 Service information can be downloaded here:- http://www.service-data.com/product....70/6070/a14770 __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.