tubes

I have some old Mullards - EL34, ecc82 and ecc83, some NOS, others  used. I've no tube tester. Where in Greater London area could I test it properly? 

Job lot of valves from my spares box. I believe these are unused but selling as spares incase some have been in an amp for testing only. Two JJ ecc83s Two JJ ecc81 JJ GZ34s Electro Harmonix 12ax7 eh boxed JHS Sylvania 12AT7  £50 including UK postage.

I've just got my first tube amp, a Mactone MH-300B. I've heard all about tube rolling so thought I'd give it a go but IMHO it doesn't make any difference at all to sound quality.  Am I doing this wrong?

London UK:  I have two PP amps for sale - DHTs right through and filament bias: 1. PP 26>4P1L>6C4C (6B4G). 2 chassis - signal chassis and PSU chassis. This is a complex build with great sound. It has 8 DC filament supplies and regulators. The outputs are AC. OPT is O-netics. This is a...

Bought as a spare pair earlier this year, never used, and now surplus to requirement. They were supplied by Grant Fidelity and, as the certificate shows, are 'premium-grade'. You can order your own from Grant Fidelity for £225 plus VAT and import duty for an all-up cost of circa £290... ...or...