Topic: V3 & 7AH SLA run-time test

[Brian Skalinder]

Just tested my V3 with a 7AH SLA in prep for some festivals I'm attending.  I have a handful of 10AH SLAs (still charging), one of which I'll be testing tomorrow, hopefully.  Anyway, many of you know I post regularly on how to calculate theoretical run-times for your gear.

I thought some may be interested in my actual run-time:

• 6v, 7AH SLA
• 48v phantom on to a pair of CMC64s
• Single SPDIF out to a deck
• ANSR on
• 48 kHz
• Low battery light started flashing at 4 hrs
• V3 shut off at 5 hrs 15 min

So...I got 75% of the rated rated SLA capacity.

[Tim]

thanks Brian!

[JAH]

Just tested my V3 with a 7AH SLA in prep for some festivals I'm attending.  I have a handful of 10AH SLAs (still charging), one of which I'll be testing tomorrow, hopefully.  Anyway, many of you know I post regularly on how to calculate theoretical run-times for your gear.

I thought some may be interested in my actual run-time:
Interesting...we usually say 15 to 20% and this time  (meaning a sample of one....as newer and older SLA times may vary...but still great info).
did you notice any degradation on the V3 (distortion???).
I run both the 10ah and the 7ah.  The 10ah has 2 taps for the short shows (3 hrs'ish)...that way I can run the msbm-1 and the P1 (since the 148 has internals).

Keep up the good work
jah

• 6v, 7AH SLA
• 48v phantom on to a pair of CMC64s
• Single SPDIF out to a deck
• ANSR on
• 48 kHz
• Low battery light started flashing at 4 hrs
• V3 shut off at 5 hrs 15 min

So...I got 75% of the rated rated SLA capacity.

[DaryanLenz]

Bean and I got at least 7 hours of actual usage pushing one saturday suring Panic!

daryan

[Brian Skalinder]

Jah  --  I didn't monitor sonic performance during the batt test, so I don't know if the V3 exhibited any degradation.  Just didn't think of it at the time - I figured the Grace folks wouldn't place the cut-off voltage so low that it would degrade performance, but...something to keep in mind if/when I run another test.

Daryan  --  You got 7 hours out of what capacity SLA...7AH?  10AH?

[DaryanLenz]

I think it was an eco charge...I assume 7amh...we pushed it and made it!

daryan

[Brian Skalinder]

I think it was an eco charge...I assume 7amh...we pushed it and made it!

daryan

Glad you made it!

Did the low batt light come on?  Were you running the ADC the entire time?

Pretty big discrepancy between my 5:15 and your 7:00 hrs.  I know current draw can be pretty variable when using phantom depending on the mics, so that might account for it.  Or maybe my SLA isn't what it used to be.  I'll try to remember to post how my brand-new SLAs work during festivals the next two weeks...curious to see how they perform.

[Nick S.]

7 hours using what mics?  MIght explain the difference in record time!

Nick

[tim in jersey]

I just did Gathering Of The Vibes this weekend and had very similar results as Brian. The low battery light began to flash at roughly 3.5-4 hours. I got another 1:30 out of it, and then swapped batteries for the next couple sets. My 7.2ah SLA's are very low milage.

I ran:

CMC 64's
48V
ANSR
1 SPDIF @ 44.1

[F.O.Bean]

I think it was an eco charge...I assume 7amh...we pushed it and made it!

daryan

we did everything you did.....ad on, phantom on, 48k, ansr,pair of mg 200's, and i think we got about 6-6.5 max due to my geeky timing... ;)but still, hell yeah....

oh, and it was a 7.2 a..... 8)and sonically, i cannot tell one bit of a difference..... ;Dand the low batt starts flashing faster, and faster....also, it was a four year batt, my first one i got in 99..... :oi would guess mic curent draw is a factor here.....

bean

[rabhan]

from mike grace - the v3 should be set to flash low batt @5.75V and power off @5.2V. if you run a 6v below 5v, you will destroy its lifespan. there is no performance fluctuations between 6.5V and 5.2V on the v3.

http://www.taperssection.com/yabbse/index.php?board=20;action=display;threadid=3136;start=msg25257#msg25257

-the standard eco charger will charge a 6v 12ah batt, but it wont float, so you will have to watch it with a meter.

http://www.taperssection.com/yabbse/index.php?board=1;action=display;threadid=2745;start=msg21865#msg21865

[John R]

man, running the 7.2Ah with the 184's i was going all day at telluride, 10am to 6-7pm, before i move to another batt

jr

[rabhan]

12v or 6v ?

[John R]

12v or 6v ?

12v

[rabhan]

yeah, i believe everyone else in this thread has a 6v, thats why you get longer runtimes.