Mullard 3-3 dc voltages help - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Diabolical Artificer · 28th Apr 2019, 8:38 am

Interesting, glad to got it working.

Andy.

Sideband · 28th Apr 2019, 9:02 am

The original Mullard EF86's must have had tighter tolerances. I never had problems in the past and when I built one of these into a record player, I didn't even use a particularly good output transformer....adequate of course but not excellent.

For what they are, these little amps give a good account of themselves.

barrymagrec · 28th Apr 2019, 10:42 am

When I was about 14 I built a 3-3 using only "available" parts which included an EF36 and a KT61 with an unknown HMVish output transformer - worked beautifully.

28th Apr 2019, 8:38 am	#21
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,667	Re: Mullard 3-3 dc voltages help Interesting, glad to got it working. Andy. __________________ Curiosity hasn't killed this cat...so far.

28th Apr 2019, 9:02 am	#22
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,578	Re: Mullard 3-3 dc voltages help The original Mullard EF86's must have had tighter tolerances. I never had problems in the past and when I built one of these into a record player, I didn't even use a particularly good output transformer....adequate of course but not excellent. For what they are, these little amps give a good account of themselves. __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....

28th Apr 2019, 10:42 am	#23
barrymagrec Octode Join Date: Dec 2017 Location: Morden, Surrey, UK. Posts: 1,561	Re: Mullard 3-3 dc voltages help When I was about 14 I built a 3-3 using only "available" parts which included an EF36 and a KT61 with an unknown HMVish output transformer - worked beautifully.