Defiant radio - UK Vintage Radio Repair and Restoration Discussion Forum

EF80TVVALVE · 9th Jan 2022, 8:34 pm

Hi all,

As some of you may have seen I posted a wanted request in hopes to find a coil for this Defiant radio. I thought I'd post a thread in this section to help identify the chassis. Reading online it seems that Defiant used Plessey chassis in a lot of their sets so I wonder if any member can identify the chassis and relevant service information.

I'm not too sure if the coil can be replaced with one from a different set or whether I need to find an identical coil. It's in very poor condition and has obviously been crushed by something. It would be a shame to write the set off as it has a very nice bakelite cabinet.

kestrelmusic · 10th Jan 2022, 2:25 pm

What is the valve line-up? From above they look like Mazda octals - if they are it woudl narrow it down a good bit.

mister valve · 12th Jan 2022, 1:50 pm

Definitely I would say they are all "Mazda Octal's", looking at the picture. I would think the valve line-up would be :- TH41, VP41, HL41DD (or pos. HL42DD), PEN45, UU6. They were more or less the standard range in a four valve plus rectifier, A.C. only mains set.

ms660 · 12th Jan 2022, 2:15 pm

The chassis is the same as the Defiant MSH 546.

Lawrence.

EF80TVVALVE · 13th Jan 2022, 11:06 pm

Hi all,

Apologies for somewhat neglecting this thread for the last few days. Lawrence kindly sent me a PM and helped to confirm that the radio is indeed an MSH546. I haven't had chance to have a closer look at the chassis and coil yet but hopefully I will have some time tomorrow to investigate if the coil can be saved or if it will need to be replaced.

Cheers
Bren

9th Jan 2022, 8:34 pm	#1
EF80TVVALVE Octode Join Date: Feb 2010 Location: Leicester, UK. Posts: 1,433	Defiant radio Hi all, As some of you may have seen I posted a wanted request in hopes to find a coil for this Defiant radio. I thought I'd post a thread in this section to help identify the chassis. Reading online it seems that Defiant used Plessey chassis in a lot of their sets so I wonder if any member can identify the chassis and relevant service information. I'm not too sure if the coil can be replaced with one from a different set or whether I need to find an identical coil. It's in very poor condition and has obviously been crushed by something. It would be a shame to write the set off as it has a very nice bakelite cabinet. Attached Thumbnails

10th Jan 2022, 2:25 pm	#2
kestrelmusic Hexode Join Date: Feb 2008 Location: Wrexham, North Wales, UK. Posts: 466	Re: Defiant radio What is the valve line-up? From above they look like Mazda octals - if they are it woudl narrow it down a good bit.

12th Jan 2022, 1:50 pm	#3
mister valve Hexode Join Date: Aug 2009 Location: Blackpool, Lancashire, UK. Posts: 311	Re: Defiant radio Definitely I would say they are all "Mazda Octal's", looking at the picture. I would think the valve line-up would be :- TH41, VP41, HL41DD (or pos. HL42DD), PEN45, UU6. They were more or less the standard range in a four valve plus rectifier, A.C. only mains set. __________________ If you live, the chassis was dead; if you're dead, the chassis was live !!!!

12th Jan 2022, 2:15 pm	#4
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Defiant radio The chassis is the same as the Defiant MSH 546. Lawrence.

13th Jan 2022, 11:06 pm	#5
EF80TVVALVE Octode Join Date: Feb 2010 Location: Leicester, UK. Posts: 1,433	Re: Defiant radio Hi all, Apologies for somewhat neglecting this thread for the last few days. Lawrence kindly sent me a PM and helped to confirm that the radio is indeed an MSH546. I haven't had chance to have a closer look at the chassis and coil yet but hopefully I will have some time tomorrow to investigate if the coil can be saved or if it will need to be replaced. Cheers Bren