Components and Circuits - UK Vintage Radio Repair and Restoration Discussion Forum

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Components and Circuits

Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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	Rating Thread / Thread Starter	Last Post	Replies	Views
Sticky Threads
	Sticky: Battery case links and scans. ( 1 2 3 4) RadioHist (6th Jan 2014)	17th Aug 2025 8:14 am by markgengine	67	86,525
	Sticky: AF11x transistors, 'tin whisker' problems and solutions. Darren-UK (15th Nov 2011)	11th Feb 2018 3:35 pm by AC/HL	2	46,790
	Sticky: Fuses ( 1 2 3) Radio_Dave (8th Jan 2007)	1st Feb 2016 9:11 pm by trobbins	53	114,912
	Sticky: Capacitors in series - pitfalls? ( 1 2 3) Andy Day (29th Aug 2007)	1st Jul 2015 4:32 pm by Herald1360	58	94,420
	Sticky: Battery box and socket details. ( 1 2) neon indicator (28th Jun 2011)	25th Jun 2015 7:19 pm by TonyDuell	36	62,037
	Sticky: Testing a transformer for shorted turns Merlin (24th Jan 2007)	30th Nov 2014 5:34 pm by Eddy_Stone	16	59,670
	Sticky: Grid coupling Capacitor aka "That" cap. ( 1 2) Temporalnexus (25th Aug 2011)	25th Mar 2014 2:32 pm by Station X	34	64,381
	Sticky: Testing an output transformer Radio_Dave (30th Jul 2007)	29th Apr 2013 5:01 pm by Herald1360	11	53,057
	Sticky: Replacement non-electrolytic capacitor values. Station X (2nd Oct 2012)	2nd Oct 2012 8:00 am by Station X	0	43,801
	Sticky: Class X2 and Class Y Capacitors. Station X (16th Dec 2010)	16th Dec 2010 6:40 pm by Station X	0	36,392
	Sticky: Testing transistors. Mike Phelan (27th Oct 2010)	27th Oct 2010 10:23 am by Mike Phelan	0	44,938
	Sticky: Testing transistors - analogue version DAVEHALL (15th May 2010)	7th Sep 2010 11:51 am by Lee.Wilkerson	3	30,640
	Sticky: Testing Transistors. Station X (20th Jun 2009)	20th Jun 2009 2:57 pm by Station X	3	34,154
Normal Threads
	Mullard 5-10 phase splitter puzzle ( 1 2) qualityten (12th Feb 2026)	Yesterday 10:34 pm by kalee20	38	1,123
	EPROM vexing problem. McMurdo (12th Feb 2026)	Yesterday 10:35 am by SiriusHardware	4	379
	RIFAs up to their tricks again Philips210 (9th Feb 2026)	14th Feb 2026 8:09 pm by Maarten	2	340
	Pye capacitors ejrietbergen (28th Dec 2025)	14th Feb 2026 8:05 pm by Maarten	13	881
	Capacitor working voltage alanworland (10th Feb 2026)	14th Feb 2026 8:00 pm by Maarten	6	423
	Replacing faulty STK series hybrids John_BS (22nd Jul 2025)	13th Feb 2026 5:37 pm by John_BS	17	2,383
	Equivalent Transistor cross reference assistance required ( 1 2) paul1962 (8th Feb 2026)	12th Feb 2026 3:29 am by paul1962	35	1,203
	Purpose of multi-tapped LV Transformer Julesomega (8th Feb 2026)	10th Feb 2026 7:20 pm by Julesomega	9	563
	Silver plated copper coil ( 1 2) John10b (28th Jan 2026)	8th Feb 2026 7:27 pm by m0cemdave	39	2,079
	My Mains supply voltage is at 211 volts, WTH is going on! MostlyHarmless (8th Feb 2026)	8th Feb 2026 6:16 pm by Cobaltblue	3	341
	80 valve heater? mole42uk (8th Feb 2026)	8th Feb 2026 4:44 pm by mole42uk	2	279
	ID resistors please. CambridgeWorks (7th Feb 2026)	8th Feb 2026 3:06 pm by Maarten	14	568
	Cement. Nanozeugma (4th Feb 2026)	6th Feb 2026 2:25 pm by The Philpott	12	1,038
	When tantalums fail.... ( 1 2) G6Tanuki (8th Dec 2025)	4th Feb 2026 4:00 pm by Ceeejay	35	2,627
	Replacing 8 X KT88 in Quad 11 80 ( 1 2 3) rogerbehagg (22nd Jan 2026)	3rd Feb 2026 1:08 pm by Radio Wrangler	57	2,228
	Identifying unknown items ( 1 2 3 4 5 6) Julesomega (2nd Mar 2021)	2nd Feb 2026 7:25 pm by Julesomega	113	25,401
	Cleaning a roller-coaster coil. G6Tanuki (1st Feb 2026)	2nd Feb 2026 11:21 am by G6Tanuki	5	513
	TO-3 Transistor package question MostlyHarmless (26th Jan 2026)	29th Jan 2026 10:32 pm by ortek_service	6	658
	Philips Rimlock valves – Manufactured in Japan? th2000125 (24th Jan 2026)	26th Jan 2026 12:57 pm by th2000125	9	700
	PYE o/p t/x manufacture in the 1950s Valvepower (20th Oct 2025)	22nd Jan 2026 4:20 pm by toprepairman	13	1,230