LM13700 both op amps in parallel?

All frequent questions about ICs of all kinds, will be stored here.
Post Reply
User avatar
johnnyg
Resistor Ronker
Information
Posts: 418
Joined: 31 Oct 2009, 16:57
Has thanked: 92 times
Been thanked: 43 times

Post by johnnyg »

Excuse me if this is a stupid question, I've a lot to learn (esp using ICs & not simpler transistors & valves). But I was looking at using the lm13700 in place of the ca3080 (to build a Ross/dyna comp unsuprisingly).

I was curious though if you could use both op amps in the 13700 in parallel in place of the ca3080. I've some idea of the use and benefits of valves in parallel. I was just curious if anyone had tried using a lm13700 in parallel... it feels a bit wasteful to only employ half of it.
Yet to break through the Space Charge

User avatar
grrrunge
Diode Debunker
Information
Posts: 810
Joined: 20 Mar 2010, 10:51
Completed builds: Loads!
Location: Copenhagen, Denmark
Has thanked: 50 times
Been thanked: 206 times
Contact:

Post by grrrunge »

How about a dual compressor? Use one half of the LM13700 for a ross and the other for a dyna-comp... That's what i'd do ;)
A true believer in the magic of Sherwood Forest Pedal Pirates
---
New base of operations: http://www.knucklehead.dk

User avatar
johnnyg
Resistor Ronker
Information
Posts: 418
Joined: 31 Oct 2009, 16:57
Has thanked: 92 times
Been thanked: 43 times

Post by johnnyg »

That's a nice, simple idea that hadn't occurred to me, thanks :wink: (If I had the lm13700 on its own board and connected to each circuit by flying leads I wouldn't even have to come up with a new layout)
Yet to break through the Space Charge

User avatar
frequencycentral
Cap Cooler
Information
Posts: 696
Joined: 30 Mar 2009, 09:37
Location: United Kingdom
Has thanked: 28 times
Been thanked: 61 times

Post by frequencycentral »

@ johnnyg - we are very much enjoying your avatar, tell us more about it. :wink:

User avatar
johnnyg
Resistor Ronker
Information
Posts: 418
Joined: 31 Oct 2009, 16:57
Has thanked: 92 times
Been thanked: 43 times

Post by johnnyg »

:D :wink: It's Iggy Pop & James Williamson from around the time of the Kill City recordings (which JW remastered and was only properly released in 2010 incidentally; well worth getting if you've heard and like the earlier releases that were just demos really). I don't know who the derriere belongs to though :)

Occurred to me that both compressors in a box wld be a Dyna Ross... :block:
Yet to break through the Space Charge

User avatar
Dirk_Hendrik
Old Solderhand
Information
Posts: 4193
Joined: 03 Jul 2007, 08:44
Location: Old Amsterdam
Has thanked: 232 times
Been thanked: 887 times
Contact:

Post by Dirk_Hendrik »

johnnyg wrote:Excuse me if this is a stupid question, I've a lot to learn (esp using ICs & not simpler transistors & valves). But I was looking at using the lm13700 in place of the ca3080 (to build a Ross/dyna comp unsuprisingly).

I was curious though if you could use both op amps in the 13700 in parallel in place of the ca3080. I've some idea of the use and benefits of valves in parallel. I was just curious if anyone had tried using a lm13700 in parallel... it feels a bit wasteful to only employ half of it.
Do something with the other half. Stereo for the price of mono for example. Do not connect em parallel. Parallelling opamps is something some DIY-ers do because somewhere online someone claims superior sounds. Anyone with a decent engineering mind will understand a) it's bullshit and b) asking for trouble.
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

User avatar
johnnyg
Resistor Ronker
Information
Posts: 418
Joined: 31 Oct 2009, 16:57
Has thanked: 92 times
Been thanked: 43 times

Post by johnnyg »

Thanks Dirk!
Yet to break through the Space Charge

Post Reply