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: Fuses ( 1 2 3) Radio_Dave (8th Jan 2007)	1st Feb 2016 10:11 pm by trobbins	53	59,782
	Sticky: capacitors in series - pitfalls? ( 1 2 3) Andy Day (29th Aug 2007)	1st Jul 2015 5:32 pm by Herald1360	58	40,399
	Sticky: Testing a transformer for shorted turns Merlin (24th Jan 2007)	30th Nov 2014 6:34 pm by Eddy_Stone	16	32,332
	Sticky: Grid coupling Capacitor aka "That" cap. ( 1 2) Courtney Louise (25th Aug 2011)	25th Mar 2014 3:32 pm by Station X	34	27,197
	Sticky: Testing an output transformer Radio_Dave (30th Jul 2007)	29th Apr 2013 6:01 pm by Herald1360	11	24,675
	Sticky: Battery box and socket details. ( 1 2) neon indicator (28th Jun 2011)	25th Jun 2015 8:19 pm by TonyDuell	36	21,670
	Sticky: Battery case links and scans. ( 1 2 3 4) RadioHist (6th Jan 2014)	31st Aug 2019 9:01 pm by ThePillenwerfer	60	20,597
	Sticky: Replacement non-electrolytic capacitor values. Station X (2nd Oct 2012)	2nd Oct 2012 9:00 am by Station X	0	19,860
	Sticky: Testing transistors. Mike Phelan (27th Oct 2010)	27th Oct 2010 11:23 am by Mike Phelan	0	19,748
	Sticky: AF11x transistors, 'tin whisker' problems and solutions. Darren-UK (15th Nov 2011)	11th Feb 2018 4:35 pm by AC/HL	2	18,718
	Sticky: Testing Transistors. Station X (20th Jun 2009)	20th Jun 2009 3:57 pm by Station X	3	16,283
	Sticky: Class X2 and Class Y Capacitors. Station X (16th Dec 2010)	16th Dec 2010 7:40 pm by Station X	0	15,568
	Sticky: Testing transistors - analogue version DAVEHALL (16th May 2010)	7th Sep 2010 12:51 pm by Lee.Wilkerson	3	13,401
Normal Threads
	Russian Military Subminature "pencil" valves ( 1 2 3 4 5 6) neon indicator (12th May 2011)	14th Oct 2011 1:26 pm by neon indicator	115	53,011
	FET Questions ( 1 2 3 4 5 6) Synchrodyne (6th Aug 2013)	7th Jan 2016 11:47 pm by Synchrodyne	105	52,504
	Beware Rifa Class X Capacitors! ( 1 2 3 4 5 6 7 8 9 10 ... Last Page) murphyv310 (9th May 2011)	16th May 2017 11:42 pm by MrBungle	200	46,716
	Quasi-Synchronous Demodulation ( 1 2) Synchrodyne (25th Jul 2010)	9th Dec 2015 9:34 am by Synchrodyne	32	22,931
	Whiskers in germanium transistors etc ( 1 2) Paul Stenning (22nd Sep 2005)	12th Mar 2006 10:47 pm by Steve_P	31	20,823
	Advantages of ECC85 over ECC81? ( 1 2) Tractorfan (9th Jun 2010)	16th Jun 2010 3:16 am by Synchrodyne	20	19,022
	4 Digit Up/Down Counter IC? ( 1 2 3 4 5 6) Amraduk (2nd Sep 2011)	10th Apr 2013 10:25 am by kipperdog	119	15,221
	AF117 replacements Hybrid tellies (7th Jul 2007)	19th Jul 2007 9:22 pm by Robert Darwent	18	14,932
	EL or PL509 as an audio output valve. FERNSEH (28th Jan 2010)	24th Feb 2010 8:49 am by Billy T	19	14,004
	RCA transistor app notes / amplifier design Lucien Nunes (13th Sep 2010)	11th Jan 2012 9:40 pm by Lucien Nunes	18	14,001
	My first experience with electronic tubes ( 1 2 3 4 5 6) Miguel Lopez (19th Dec 2011)	2nd Jul 2012 3:19 pm by Miguel Lopez	112	13,789
	Is a 47uf a good replacement for a 50uf electrolytic capacitor? Rick62008 (25th Jan 2011)	27th Jan 2011 2:45 pm by howard	12	13,191
	Replacing valves with FET's. ( 1 2) Mach One (19th Oct 2005)	28th Jun 2007 5:44 pm by GJR 11L	39	13,007
	Triode vs Pentode ( 1 2 3) neon indicator (11th Jul 2011)	13th Aug 2011 6:29 am by Synchrodyne	41	12,995
	Homemade Denco Coils jim_jobe (10th Oct 2007)	26th Jan 2008 10:24 pm by Wilko	14	12,946
	Date Coding for Hunts / Erie capacitors ( 1 2 3) Farnze102 (3rd Jan 2012)	8th Jan 2015 9:25 pm by Lucien Nunes	51	12,556
	FM to AM Converter? ( 1 2 3 4 5) Bobdger (5th Jun 2017)	26th Mar 2019 2:33 pm by 60 oldjohn	80	12,271
	UY85 UL84 Amplifier ( 1 2) spontaflex (23rd Jan 2011)	30th Sep 2013 7:15 pm by AC/HL	24	11,875
	Frequency Standards ( 1 2) RobinBirch (20th Dec 2007)	5th Jan 2008 6:42 pm by dsergeant	32	11,800
	AM Micro Transmitter ( 1 2 3 4 5) dominicbeesley (19th Feb 2008)	6th Apr 2008 8:49 pm by kalee20	88	11,775