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Author Topic: Aerco MP-2 preamp - Part 2  (Read 79745 times)

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Offline spyder9

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Re: Aerco MP-2 preamp - Part 2
« Reply #270 on: August 09, 2018, 09:52:29 AM »
Well, my LIPO's finally gave out when I was in Colorado last month.  95 degree heat will kill lithiums every time.  My bats lasted 6 years.

Any hoot, Jerry installed the following during the original mod:  Max Force 7.4V 900mah 25C 2S1P  Sadly, they're not made anymore.

Below is what I found on the 'net.  GoolRC 7.4V 900mah 25C 2S   They go for about $10/piece and are the exact same size as the Max Force.  They arrived yesterday and charged up fine during the overnight.  Maiden voyage is tonight. 

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Re: Aerco MP-2 preamp - Part 2
« Reply #271 on: August 09, 2018, 10:37:55 AM »
^ Good luck on the maiden voyage!
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Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #272 on: August 09, 2018, 12:22:15 PM »

I accidentally pulled out the wires from the PCB when I was replacing my LiPo batteries. I sent it back to Jerry and he compared fixing it to brain surgery. I may have been careless but be extra careful not to put any stress on the wires that go to the PCB when you are replacing the batteries. I think I messed mine up when I was trying to get some batteries that were just a millimeter or two too large to fit in the little space in the case.
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

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Offline audBall

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Re: Aerco MP-2 preamp - Part 2
« Reply #273 on: January 26, 2019, 11:40:24 PM »
Anyone looking to part with a good-very good+ condition MP2?
akg ck61/62/63/77(c577)|naiant.pfa, dpa smk-sc4061 
lunatec v2, mma-a d:vice, mma-6000
edirol-r44(ocm), sony pcm-m10,-d100

PISO akg nbob cables

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #274 on: February 02, 2019, 06:27:42 PM »
Howdy! I might be interested in moving my Aerco MP2 to a new home. It's just not getting the action that it should. It went back to Jerry about 6 months ago to have new batteries installed and fix the battery wiring.

Let me know if you are interested and I can text you some pics and give details. It has most of the usual options - internal rechargeable batts, XLR in, RCA and mini out, stepped gain on one knob in 10dB steps, stepped trim on the other in 2dB steps, on off switch on the back and a DC input on the side plus the DIN connector for charging the batts. Includes the gigantic battery recharger dealio.

I paid $500 and spent another $100+ on batteries and shipping it to Jerry. I'd let it go for $525 shipped. Gotta put a new exhaust on my truck...
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Offline audBall

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Re: Aerco MP-2 preamp - Part 2
« Reply #275 on: February 02, 2019, 07:01:16 PM »
Thanks for the response. 

edit- By "DC input", does it run on external batteries as well?
« Last Edit: February 02, 2019, 07:47:28 PM by audBall »
akg ck61/62/63/77(c577)|naiant.pfa, dpa smk-sc4061 
lunatec v2, mma-a d:vice, mma-6000
edirol-r44(ocm), sony pcm-m10,-d100

PISO akg nbob cables

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #276 on: February 02, 2019, 08:22:57 PM »
Thanks for the response. 

edit- By "DC input", does it run on external batteries as well?

Correct. I have a janky cable for a DVD battery that I can throw in as well.
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Offline spyder9

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Re: Aerco MP-2 preamp - Part 2
« Reply #277 on: February 18, 2019, 09:43:06 PM »
Touching base from last summer.  I'm happy to announce that the above  GoolRC 7.4V 900mah 25C 2S are excellent batteries for the Aerco.   I finally ran a test this afternoon and got 9 hours and 13 minutes of continuous recording.  Batteries were still working when I decided that was close enough.  So buy the above GoolRC's with confidence.  I bought mine on eBay, but Amazon still has them. 

Rig used for the test:  Nakamichi CM-1000 CP-101 (Sank P48) > Aerco MP-2 > Sony PCM-M10 24/44.1

https://www.amazon.com/GoolRC-900mAh-Battery-Helicopter-Quadcopter/dp/B015FLUHBA/ref=sr_1_1?ie=UTF8&qid=1550544468&sr=8-1&keywords=GoolRC+7.4V+900mah+25C+2S
« Last Edit: February 18, 2019, 09:48:29 PM by spyder9 »

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #278 on: March 02, 2019, 12:14:17 PM »
Touching base from last summer.  I'm happy to announce that the above  GoolRC 7.4V 900mah 25C 2S are excellent batteries for the Aerco.   I finally ran a test this afternoon and got 9 hours and 13 minutes of continuous recording.  Batteries were still working when I decided that was close enough.  So buy the above GoolRC's with confidence.  I bought mine on eBay, but Amazon still has them. 

Rig used for the test:  Nakamichi CM-1000 CP-101 (Sank P48) > Aerco MP-2 > Sony PCM-M10 24/44.1

https://www.amazon.com/GoolRC-900mAh-Battery-Helicopter-Quadcopter/dp/B015FLUHBA/ref=sr_1_1?ie=UTF8&qid=1550544468&sr=8-1&keywords=GoolRC+7.4V+900mah+25C+2S

I bought a pair of these and they don't fit in mine. Not even close. They are at least a half inch too long. When I sent mine back to Jerry it looks like he made a couple small changes and secured the battery connectors to the base of the case - but even if I pried that up so that it floated like it used to (and I did) the batteries would still be laying on top of the PCB up front and I wouldn't want them to bang around on any of the circuit components. Dang it! 

The batteries that I bought that did fit I think are suspect as I've been having a few issues similar to when my originals swelled up and died.
« Last Edit: March 02, 2019, 03:14:23 PM by goodcooker »
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Offline spyder9

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Re: Aerco MP-2 preamp - Part 2
« Reply #279 on: March 04, 2019, 04:56:49 PM »
Touching base from last summer.  I'm happy to announce that the above  GoolRC 7.4V 900mah 25C 2S are excellent batteries for the Aerco.   I finally ran a test this afternoon and got 9 hours and 13 minutes of continuous recording.  Batteries were still working when I decided that was close enough.  So buy the above GoolRC's with confidence.  I bought mine on eBay, but Amazon still has them. 

Rig used for the test:  Nakamichi CM-1000 CP-101 (Sank P48) > Aerco MP-2 > Sony PCM-M10 24/44.1

https://www.amazon.com/GoolRC-900mAh-Battery-Helicopter-Quadcopter/dp/B015FLUHBA/ref=sr_1_1?ie=UTF8&qid=1550544468&sr=8-1&keywords=GoolRC+7.4V+900mah+25C+2S

I bought a pair of these and they don't fit in mine. Not even close. They are at least a half inch too long. When I sent mine back to Jerry it looks like he made a couple small changes and secured the battery connectors to the base of the case - but even if I pried that up so that it floated like it used to (and I did) the batteries would still be laying on top of the PCB up front and I wouldn't want them to bang around on any of the circuit components. Dang it! 

The batteries that I bought that did fit I think are suspect as I've been having a few issues similar to when my originals swelled up and died.

The above GoolRC are the exact same size as the original bats installed by Jerry himself.  Exact.  What do you have in there now?  Which brand?  Note:  Anything over 900mah will be too big for his design layout in the case.       
« Last Edit: March 04, 2019, 04:58:32 PM by spyder9 »

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #280 on: March 07, 2019, 01:21:35 PM »
The above GoolRC are the exact same size as the original bats installed by Jerry himself.  Exact.  What do you have in there now?  Which brand?  Note:  Anything over 900mah will be too big for his design layout in the case.     

These are definitely bigger than the batteries that originally came in mine. I bought several sets of replacements of different sizes and only the smallest ones would fit. The ones you linked to are too big by a half inch or more.

I really like the sound of the Aerco with the mics I'm running but to be perfectly honest I've lost several recordings to power issues and it's generally been a pain in my ass even after paying Jerry to fix it and now I'm still having problems with it.

Will probably lock open the top cover to keep the battery connector cables from getting crushed and just tape the new batteries to the outside to run some tests in the field and see if the new batteries at least get me a successful recording.
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Offline spyder9

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Re: Aerco MP-2 preamp - Part 2
« Reply #281 on: March 07, 2019, 02:09:05 PM »
Can you upload a picture of your original batteries?

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #282 on: March 07, 2019, 04:18:54 PM »
Can you upload a picture of your original batteries?

I recycled them.
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Offline goodcooker

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Re: Aerco MP-2 preamp - Part 2
« Reply #283 on: July 06, 2019, 10:41:28 AM »

Anyone who is running a MP2 have any experience running it onstage or up very close? I have been running on stage for some gigs lately and I get input clipping if I run any higher than the lowest gain setting. It's hard to tell what's up when there are no indicators on the preamp and the levels look good on the recorder meters but I still get clipping.

The clear answer is of course to run at low gain just wondering if anyone has experience running up close with this thing.
MBHO KA300 > PFA || Sennheiser me40-k2u || ADK S51 || Joly Mod Oktava MK012
Aerco MP2 || Grace Lunatec V2 || RAD MS2 || nBox Platinum
Tascam DR701d || PMD620

http://www.archive.org/bookmarks/goodcooker

"Are you the Zman?" - fan at Panic 10-08-10 Kansas City

"I don't know who left this perfectly good inflatable wook doll here, but if I'm blowing her up, I'm keeping her." -  hoppedup

Online Gutbucket

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Re: Aerco MP-2 preamp - Part 2
« Reply #284 on: July 09, 2019, 05:08:01 PM »
Yes, and with the same result as you, but..
I only ran the Aerco once, on-stage for a jazz gig years ago.  This was Spyder9's unit I'd borrowed to try with my Gefells.  The result was distortion in the the preamp, afterwhich Spyder sent it back to Jerry for a checkup.  Not sure what was wrong (batteries perhaps) but AFAIK after the repair Spyder has continued to use it regularly without issues, both onstage and AUD.
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