SS
CD Teac VRDS25X(Audiotuned) DECK 1210 Mat Crystal Audio Mods MN Base/Bearing/Platter+Ebony armboard Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/3 Stage Regs/Recap PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black FGS CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10
VALVE
PRE Croft Epoch(Modded) AMP Sondex S100 (Modded) SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Ref XO + Batpure supertweeters DECK Garrard 301 Mat Teunto Bearings 401(Bastin) Plinth Bamboo Arms 3009/3012 PSU Eagle+Tachometer MC Ag Meister II/FGS + Ortofon SPU MONO CABLES Arm Yannis 420.5 Litz+ SpeakerPC Tripple C+WBT-0681 Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostages Paradise(4 Box Mega-Modded) / Croft Musicmaker
Location: London/Durham
Posts: 6,878
I'm Lawrence.
Ok it's just the only two statements referring to hum are these:
"The amps exhibit no hum from the Tx when fired up but as hum like a complete bugger when you attach them to a passive speaker, this is with no pre-amp connected."
"just attached the speaker cable from the speaker to the amp. No other cables. I've just tried powering up from the wall socket and still same old hum"
Personally I'd expect them to hum a bit connected as you describe, from my own experience with valve amps. At no point do you refer to any hum when they are connected into the full system and playing music. So I'm just asking if they also hum in that situation?
Location: London
Posts: 6
I'm Richard.
https://www.ebay.co.uk/itm/284646515...EAAOSwhMFh-TCk
"Note: This 300B tube amplifier is second-hand, and there is some noise because the tube filament voltage is not adjusted well, we will send you a potentiometer to solve this problem.”
I was hoping to try these out with my ESL 57s & see if they had enough power to handle the impedance swings. SETs are usually not recommended for electrostats, but someone tried 300Bs & said they worked great.
They are affordable & good looking, so prob too good to be true!
Location: London/Durham
Posts: 6,878
I'm Lawrence.
Is it really wise to bung in a potentiometer to the average punter to solve a heater filament voltage issue??
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Last edited by Lawrence001; 12-02-2022 at 00:11.
I think they are suggesting fitment of a hum-bucking potentiometer, it may reduce the hum, it may not.
I don't think the heater voltage is the issue.
I love Hendrix for so many reasons. He was so much more than just a blues guitarist - he played damn well any kind of guitar he wanted. In fact I'm not sure if he even played the guitar - he played music. - Stevie Ray Vaughan
Location: London/Durham
Posts: 6,878
I'm Lawrence.
Either way I'm not sure eBay would approve of them saying this in the description "we will send you a potentiometer to solve this problem.”
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Location: Suffolk
Posts: 1,996
I'm guy.
Strange that if it would be easy for potential purchaser to fix that the seller doesn't just do it before listing
LP12, Ittok (black), DV10X5, NVA Phono 2 (twin supply), NVAP50, Art Audio Quintet 15w power amp, NVA LS5 cable, Rega Ela mk1's.
Sony CDP XB930.
Location: London
Posts: 6
I'm Richard.
You'll not get one either!
SS
CD Teac VRDS25X(Audiotuned) DECK 1210 Mat Crystal Audio Mods MN Base/Bearing/Platter+Ebony armboard Feet Isonoe PSU Paul Hynes SR7EHD-27XL/DCSXL Ag DC lead/3 Stage Regs/Recap PCB+No Pitch/Strobe/Light ARM SME V(Kondo Ag Rewire&Tags) MC Cadenza Black FGS CABLES Arm Yannis SPD-4 IC Yannis 222 Litz+Ag bullets Power WAR PRE ATC SCA2 SPEAKERS ATC 50ASL STANDS Atacama PHONO Sugden Masterclass PA4 SUT Ortofon ST80SE POWER PSAudio P10
VALVE
PRE Croft Epoch(Modded) AMP Sondex S100 (Modded) SPEAKERS Tannoy 15"MG+RFC Warwick cabs+ Ref XO + Batpure supertweeters DECK Garrard 301 Mat Teunto Bearings 401(Bastin) Plinth Bamboo Arms 3009/3012 PSU Eagle+Tachometer MC Ag Meister II/FGS + Ortofon SPU MONO CABLES Arm Yannis 420.5 Litz+ SpeakerPC Tripple C+WBT-0681 Ag IC Oyaide FTVS-510 AgWBT 0110Ag Phonostages Paradise(4 Box Mega-Modded) / Croft Musicmaker