Jump to content
Gibson Brands Forums

Would it be practical?


Recommended Posts

Would it be possible/practical to run a VJR off of batteries(4-8 Ds?) or maybe a lithium battery?

I'm not sure whether or not, but it seems like a batter pack would be a cool addition to the combo, maybe epi could work on a more portable combo VJR, something to make it even more competitive with the roland mircrocube(they're similar in price, but the roland can work off of battery power). Seems like a cool idea to me.

Link to comment
Share on other sites

Well if anything could do it it would be a Lipo. I fly large RC aiprlanes off of Lipo packs making big horse power. The packs are out there.

http://hobby-lobby.com/lithium-polymer.htm

 

Yup...but herein lies the problem....the original question was is it practical? The answer would be no if a Lipo battery pack costs $75 to $150 for a $129 amp!:)

Link to comment
Share on other sites

Oh, no doubt you can find batteries that can handle the power necessary, but for how long and at what expense? The batteries you point out could drive an EJr for at most 2 hours - and they will cost as much as the EJr did. You could go cheaper and use a car battery, but how portable is that? And that's not even getting into the circuitry necessary to turn that perfect DC into something better resembling a simple rectified AC that gives a tube amp its character.

Link to comment
Share on other sites

My simple solution is I carry one of those multi use air pump, battery jump units in my golf cart. I haven't tried to get it to power my VJr but I will try it at my next outdoor show.

You can plug right into it and your cool if your truck battery dies! I think you can get these for between $49 to $79 - maybe still too expensive, unless you already have one laying around.

 

419T09M4THL._SL500_AA280_.jpg

 

guitargolfcart.jpg

Link to comment
Share on other sites

The ZVex Nano amp uses 12vDC. It also needs about 1.5a to get it started, but uses about 1a after that. It'll eat the charge from a small gel cel in a few hours. A 7a motorcycle battery will work, but that's a lot of weight to drag around compared to the amp. The Nano head uses low power subminiature 6021 tubes. Looks great on the dashboard, too and the amp is powerful enough to keep up with most factory car stereos.

 

If you want to run a VJr off a battery, you'll need a true sine wave inverter and a bigger battery. The usual power inverters just won't cut it since they use a modified square wave. I'm sure you can imagine what that sounds like. Here's a source...

http://www.samlexamerica.com/products/subcategory.asp?CategoryID=7&title=Pure%20Sine%20Wave%20Inverters

 

Gil...

Link to comment
Share on other sites

That is actually a 1971 Ovation copy of a 335 - the Tornado but I am 6'3" and 200 lbs' date=' it's easier to haul that battery around for me!

 

[img']http://www.theprofilebrotherhood.com/images/ovationTornadobody.jpg[/img]

 

Cool beans...ain't seen one of those since......The Partridge Family! I had a white Deacon at one point and it was a really nice neck!

Link to comment
Share on other sites

The ZVex Nano amp uses 12vDC. It also needs about 1.5a to get it started' date=' but uses about 1a after that. It'll eat the charge from a small gel cel in a few hours. A 7a motorcycle battery will work, but that's a lot of weight to drag around compared to the amp. The Nano head uses low power subminiature 6021 tubes. Looks great on the dashboard, too and the amp is powerful enough to keep up with most factory car stereos.

 

If you want to run a VJr off a battery, you'll need a true sine wave inverter and a bigger battery. The usual power inverters just won't cut it since they use a modified square wave. I'm sure you can imagine what that sounds like. Here's a source...

http://www.samlexamerica.com/products/subcategory.asp?CategoryID=7&title=Pure%20Sine%20Wave%20Inverters

 

Gil...[/quote']

Would you really need a sine wave? It's going to be rectified to DC anyway. The PT should still work..., I would think..., I could be wrong tho.

Link to comment
Share on other sites

Battery power for the tube filaments is not unheard of. In fact, there are space charged tubes designed for 12v heaters because that's what was available in most cars. But cars used vibrators to get the higher voltages they needed for the plates. Sorta like a modified square wave, but not quite the same! Hmmmm!

 

Oh well, whatever works. ZVex recommends those true sine wave inverters with their Imp amps cuz they don't have switching power supplies (like most guitar amps). That's where I got the link. So as always, YMMV. Proceed at your own risk.

 

But a properly fed el84 has about 310v DC on the plate, and 300v DC on the screen. That's a lot of batteries. But you can still run 'em with lower voltage, say 36v DC like the VVR power scaling gizmo does all the way down, but that also lowers the output significantly down to baby in the bedroom levels. Much as I hated my Pignose, you might as well save yourself the hassle and use something like that. Sure, they sound freekin' awful. If you don't have to listen to 'em all day, they can be fun; but if that's your only amp, you'll eventually want to shoot it. =D>

 

Gil...

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...