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Author Topic: V3 questions  (Read 3277 times)

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Offline kindms

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Re: V3 questions
« Reply #15 on: December 09, 2021, 10:24:09 AM »
Got a few questions about powering the V3 I recently got on YS.

Is there a way for me to figure out if my V3 is 6V or 12V? Or can I run it under either, so long as there is enough current? I was under the impression I might need to swap a jumper on the power board to switch between 6/12V, but the comments in this thread and the fact I didn’t see a labeled jumper when I popped the lid off have me questioning that.

Congrats, it's a great preamp. 

There are 2 labeled jumpers on the board (see manual linked above). I'm not sure they do anything other than perhaps adjust the V3's built-in in battery metering, but I'm only speculating so don't take that as gospel. The manual does warn against changing them without contacting the factory first, so maybe more to it.  The V3's built-in metering was intended for old-school SLA battery systems and is no longer needed with modern batteries like the Talentcell that have their own metering built-in, and different chemistry and discharge characteristics.  Best to just forget the V3 battery meter is even there.

Main thing to know about is a detail about the power input.  The center split-pin of the power cable will at some point become slightly loose in its contact socket.  When that occurs, screwing down the connector more firmly actually aggravates the power-intermittency problem rather than helping to eliminate it, because doing so centers the center pin more perfectly in its loose contact socket.  The fix is to gently spread the split pin a bit to achieve good contact again.  It will then, in my experience, work fine for many years.  If that were to ever occur in the field while recording where you need to remedy it ASAP, loosen the connector slightly and gaff tape the cable so that it pulls to one side slightly instead of being perfectly centered and the preamp should run fine the remainder of the night.

another thing to keep in mind is feeding it 12v will get it nice and hot so dont freak out but good to keep in mind if you close your bag etc
AKG c426, AKG414 XLS/ST, AKG ck61, ck22, >nBob colettes >PFA > V3, SD MixPre >  TCM-Mod Tascam HDP2, Sony M10
Little Bear tube Pre >Outlaw Audio 2200 Monoblocks > VR-2's

Offline audBall

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Re: V3 questions
« Reply #16 on: December 09, 2021, 11:17:48 AM »
^ I seem to recall the same when running at the 6v setting with a 9v battery, releasing excess power as heat.

Makes for a good lumbar heat treatment on the drive home.  ;)
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Offline wforwumbo

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Re: V3 questions
« Reply #17 on: December 11, 2021, 11:15:08 AM »
Thanks to everyone for all the replies here. Ran the v3 successfully off a 12V Talentcell battery. I ran the v3 and mixpre6 stacked on the floor next to my bag, and everything stayed cool to the touch. Normally my mixpre-6 gets extremely warm in the bag, so I think having some air flow helped keep my gear cool.
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Offline crunchy

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Re: V3 questions
« Reply #18 on: December 13, 2021, 07:21:39 PM »
I love the V3. So glad to see there is still some current conversation about this almost 20 yr old pre/AD.

Offline rocksuitcase

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Re: V3 questions
« Reply #19 on: December 14, 2021, 12:56:40 PM »
I love the V3. So glad to see there is still some current conversation about this almost 20 yr old pre/AD.
I was setting up at a show and the FOH guy was being a teacher to an apprentice guy from the local community college studying "sound engineering". FOH guy sees the Grace pre-amp, point it out, and says to the apprentice, "these taper guys carry the very best sounding gear and that pre-amp is one of the finest portables ever made".    8)
He also took time to explain what the difference is between the typical stage SM57/58 dynamic  mics and the condensor mics I was using. (AKG 460 based)
Good FOH guy.

Wumbo- The V3 seems to get very hot in an enclosed bag running at 12V. kindms also has put the battery out of the bag on the ground on very few occasions.
music IS love

When you get confused, listen to the music play!

Mics:         AKG460|CK61|CK1|CK3|CK8|Beyer M 201E|DPA 4060 SK
Recorders:Marantz PMD661 OADE Concert mod; Tascam DR680 MKI


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