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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Threads in Forum : Components and Circuits

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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	86,177
	Sticky: AF11x transistors, 'tin whisker' problems and solutions. Darren-UK (15th Nov 2011)	11th Feb 2018 3:35 pm by AC/HL	2	46,617
	Sticky: Fuses ( 1 2 3) Radio_Dave (8th Jan 2007)	1st Feb 2016 9:11 pm by trobbins	53	114,623
	Sticky: Capacitors in series - pitfalls? ( 1 2 3) Andy Day (29th Aug 2007)	1st Jul 2015 4:32 pm by Herald1360	58	94,115
	Sticky: Battery box and socket details. ( 1 2) neon indicator (28th Jun 2011)	25th Jun 2015 7:19 pm by TonyDuell	36	61,831
	Sticky: Testing a transformer for shorted turns Merlin (24th Jan 2007)	30th Nov 2014 5:34 pm by Eddy_Stone	16	59,509
	Sticky: Grid coupling Capacitor aka "That" cap. ( 1 2) Temporalnexus (25th Aug 2011)	25th Mar 2014 2:32 pm by Station X	34	64,195
	Sticky: Testing an output transformer Radio_Dave (30th Jul 2007)	29th Apr 2013 5:01 pm by Herald1360	11	52,904
	Sticky: Replacement non-electrolytic capacitor values. Station X (2nd Oct 2012)	2nd Oct 2012 8:00 am by Station X	0	43,683
	Sticky: Class X2 and Class Y Capacitors. Station X (16th Dec 2010)	16th Dec 2010 6:40 pm by Station X	0	36,273
	Sticky: Testing transistors. Mike Phelan (27th Oct 2010)	27th Oct 2010 10:23 am by Mike Phelan	0	44,809
	Sticky: Testing transistors - analogue version DAVEHALL (15th May 2010)	7th Sep 2010 11:51 am by Lee.Wilkerson	3	30,515
	Sticky: Testing Transistors. Station X (20th Jun 2009)	20th Jun 2009 2:57 pm by Station X	3	34,019
Normal Threads
	Equivalent Transistor cross reference assistance required paul1962 (Yesterday)	Today 5:23 pm by frsimen	8	241
	Purpose of multi-tapped LV Transformer Julesomega (Yesterday)	Today 4:33 pm by GMB	8	273
	Silver plated copper coil ( 1 2) John10b (28th Jan 2026)	Yesterday 7:27 pm by m0cemdave	39	1,799
	My Mains supply voltage is at 211 volts, WTH is going on! MostlyHarmless (Yesterday)	Yesterday 6:16 pm by Cobaltblue	3	186
	80 valve heater? mole42uk (Yesterday)	Yesterday 4:44 pm by mole42uk	2	167
	ID resistors please. CambridgeWorks (7th Feb 2026)	Yesterday 3:06 pm by Maarten	14	408
	Cement. Nanozeugma (4th Feb 2026)	6th Feb 2026 2:25 pm by The Philpott	12	934
	When tantalums fail.... ( 1 2) G6Tanuki (8th Dec 2025)	4th Feb 2026 4:00 pm by Ceeejay	35	2,477
	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	2,012
	Identifying unknown items ( 1 2 3 4 5 6) Julesomega (2nd Mar 2021)	2nd Feb 2026 7:25 pm by Julesomega	113	25,001
	Cleaning a roller-coaster coil. G6Tanuki (1st Feb 2026)	2nd Feb 2026 11:21 am by G6Tanuki	5	415
	TO-3 Transistor package question MostlyHarmless (26th Jan 2026)	29th Jan 2026 10:32 pm by ortek_service	6	556
	Philips Rimlock valves – Manufactured in Japan? th2000125 (24th Jan 2026)	26th Jan 2026 12:57 pm by th2000125	9	628
	PYE o/p t/x manufacture in the 1950s Valvepower (20th Oct 2025)	22nd Jan 2026 4:20 pm by toprepairman	13	1,143
	Replacement B9A sockets for Quad II amplifier. ToneArm (7th Jan 2026)	20th Jan 2026 11:30 am by turretslug	6	553
	Capacitors and rectifiers Michael Maurice (18th Jan 2026)	19th Jan 2026 6:08 pm by kalee20	7	554
	Object Identity? John10b (19th Jan 2026)	19th Jan 2026 5:35 pm by John10b	4	336
	Fun and games for valves avocollector (15th Jan 2026)	18th Jan 2026 9:09 pm by Joe_Lorenz	8	758
	DL96 heater connections? vinrads (15th Jan 2026)	15th Jan 2026 2:31 pm by VT FUSE	8	412
	What wattage are these 1 ohm resistors rated at? Robert Crumbs (11th Jan 2026)	11th Jan 2026 3:19 pm by Robert Crumbs	3	404