Tube amp volume dial issue
boston1450
Posts: 7,640
Since new this Yaqin 30L tube amp when i turn it on within 3 seconds the volume dial turns up by itself. It goes up to about 8:30 or so.... I turn it completely down when powering it off. It seems to be ok BUT i figured id ask if this is normal. I went with this model for remote & very happy with it. Should i question the seller & maybe get a better understanding ? I can live with it. Dont want future problems.
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I have turned it all the way down with remote & also by dial (manually) it happens both ways.
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I have turned it all the way down with remote & also by dial (manually) it happens both ways.
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Comments
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Don't turn it down all the way and see what happens.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I will try that. Just shut'r down. I always let it warm up for 30-40 mins before i listen to it. I will report back. Thanks..
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Just an FYI, there's no need to turn the volume control down all the way when powering off.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Ask if it was modded in anyway..
I'm on Facebook on a Yaqin group a friend of mine runs one, there are tons of guys doing DIY mods from guys posting how too's..
Maybe yours got messed up a bit..ATC SCM40's,VTL TL 2.5 Preamp,PSB Stratus Goldi's,McCormack DNA 500,McCormack MAP-1 Preamp,Pro-Ject Xtension 10 TT,Ortofon Cadenza Red/Nordost RedDawn LS Speaker cables, Bryston BDP-2, Bryston BDA-2,PS Audio AC-3 power cables -
No idea. I bought it NIB. I just thought it be best to turn it all the way down. Maybe its telling me no
i just powered it on with dial about 8:00 area & it still went to 8:30 or so. I will let it do its thing & turn it down a hair before i hit the play button. I dont listen to it loud & normal listening is around 9:00/9:30 on this unit .. -
Randy, I'll contact my buddy and ask if there is a known issue with the volume on the 30L and report back if any..ATC SCM40's,VTL TL 2.5 Preamp,PSB Stratus Goldi's,McCormack DNA 500,McCormack MAP-1 Preamp,Pro-Ject Xtension 10 TT,Ortofon Cadenza Red/Nordost RedDawn LS Speaker cables, Bryston BDP-2, Bryston BDA-2,PS Audio AC-3 power cables
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I was reading (yes reading-not sure if true) that if you turn down volume on solid state receivers all the way down it would help preserve the life longer on the caps/transistors or something like that. Im not sure if it was correct & cant recall where i read it. As far as tube amp. Im new & i figured maybe i should turn it down so it doesnt do any damage to anything. I hope sometime if future to learn more on tubes & get into something up the chain & weed out other old gear for new..
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It is programmed to turn itself down and then back up on power up. My Audio Mirror PP1 preamp does same move. It is a protection device to prevent powering on if someone has tweaked the knob wide open.HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable
2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable -
I was reading (yes reading-not sure if true) that if you turn down volume on solid state receivers all the way down it would help preserve the life longer on the caps/transistors or something like that.
Pure horse poo.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
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So if you turn it all the up and turn it off will it back to 8:30 when turned back on? If so, yeah it's programed some how.Anaheim Hills CA,
HT 5.1: Anthem MRX 720 / BDP-Denon DBT1713UD / Polkaudio LSiM703 / W4S mAmp's / Polkaudio LSiM706c / Polkaudio LSiM702F/X's / SVS PC12-NSD / Panasonic TC P55VT30
2 Channel: Rogue RP-5 / WireWorld Electra power cord / Marantz TT-15S1/ Ortofon - Quintet Black MC / Marantz NA8005 DAC / W4S mAmp's / Synology DS 216+ll-4TB / Polkaudio LSiM703 -
I notice on my Yamaha 663 avr , I always turn the volume down to mute, ( which is about -70 dbs or so ), before powering down all external power amps and then turning off avr. When I power the system up later, turning on avr first before powering up all power amps, the avr automatically is at about -56dbs.
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If source was off & i went All The Way maybe/not sure. But id say that must be what its doing & suppose to, i guess LOL. I have never gone above 10:30 (which was last week when i tried it on the SDA's On the 11's i never go above 9:30. It will never go above 10:30 ..
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Randy I just copied and pasted what was said..
Someone else said theirs does not do that..
I don't have any circuitry for the 30L so I really cannot advise. Does it use the infamous 9149 remote control chip inside. More importantly does the motor drive circuit use a transistor bridge? I did a write up about the motor control circuit, all based on theory as I have never had the chance to physically look at it. I was trying to find the answer to the problem of motor 'hang', which made it difficult to finely adjust the volume control via the remote. I discovered possible future problems for the motor drive circuit used BUT as I have already stated, it was purely theoretical.
If you fancy a read it is here:-
http://homepage.ntlworld.com/lez/MC20L/MC20L volume control problem.pdf
Page 5 shows where you could be having problems and the other bits of circuitry may help in finding perhaps an incorrect output from the 9149.ATC SCM40's,VTL TL 2.5 Preamp,PSB Stratus Goldi's,McCormack DNA 500,McCormack MAP-1 Preamp,Pro-Ject Xtension 10 TT,Ortofon Cadenza Red/Nordost RedDawn LS Speaker cables, Bryston BDP-2, Bryston BDA-2,PS Audio AC-3 power cables -
My volume that I spoke of will start turning the volume down immediately upon power on. If turned all the way up it takes 8 seconds to turn it down all the way and wait 2 seconds and then takes 2 seconds to come up to the 9 o'clock position. This all happens with the mute circuit in place the whole 12 seconds. No issue with the programming or function of this at all for me, as I turn the preamp on a few minutes ahead of listening for the tubes to preheat and settle.HT Optoma HD25 LV on 80" DIY Screen, Anthem MRX 300 Receiver, Pioneer Elite BDP 51FD Polk CS350LS, Polk SDA1C, Polk FX300, Polk RT55, Dual EBS Adire Shiva 320watt tuned to 17hz, ICs-DIY Twisted Prs, Speaker-Raymond Cable
2 Channel Thorens TD 318 Grado ZF1, SACD/CD Marantz 8260, Soundstream/Krell DAC1, Audio Mirror PP1, Odyssey Stratos, ADS L-1290, ICs-DIY Twisted , Speaker-Raymond Cable -
Interesting article. Thanks Jhayman, i will reread that again & see if i can make sence of it. I will pull out the manual tomorrow as wife is out like a light in recliner like usual & its in cabinet beside of her. It has done this since day 1& Ive owned it 2 1/2 months or so. Thank you & i will report back..
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. Ok. I just turned it up to 10:00 on dial. Turned amp on & it immediately went completely down all the way & 3 seconds later i hear relay click & it went up to 8:30. I messaged the seller i got it from. He has been great to deal with. I think its ok & its some kind of safety featureDennis Gardner wrote: »My volume that I spoke of will start turning the volume down immediately upon power on. If turned all the way up it takes 8 seconds to turn it down all the way and wait 2 seconds and then takes 2 seconds to come up to the 9 o'clock position. This all happens with the mute circuit in place the whole 12 seconds. No issue with the programming or function of this at all for me, as I turn the preamp on a few minutes ahead of listening for the tubes to preheat and settle.
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You've had it for 2.5 months, it's done it since day one and now you're asking about it!?! You're killing me here.
Don't bother the poor seller, it's obvious it's working as it should.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
