I have benn trying to find a decent alternative to the LM566 VCO. It does not seem to be sold anymore at reputable sellers and the ones on EBay (from China) I don't trust to be authentic or unrecycled. Does anyone know of a 8 to 16 pin alternative (just square and triangle out) that won't break the bank. Thanks -Slackmeister
LM566 alternative.
Started by ●August 18, 2016
Reply by ●August 19, 20162016-08-19
On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover <kevinfglover@yahoo.com> wrote:>I have benn trying to find a decent alternative to the LM566 VCO. It >does not seem to be sold anymore at reputable sellers and the ones on >EBay (from China) I don't trust to be authentic or unrecycled. Does >anyone know of a 8 to 16 pin alternative (just square and triangle >out) that won't break the bank. >Thanks >-SlackmeisterWhat is your frequency range? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website.
Reply by ●August 19, 20162016-08-19
On Thu, 18 Aug 2016 20:15:26 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:>On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover ><kevinfglover@yahoo.com> wrote: > >>I have benn trying to find a decent alternative to the LM566 VCO. It >>does not seem to be sold anymore at reputable sellers and the ones on >>EBay (from China) I don't trust to be authentic or unrecycled. Does >>anyone know of a 8 to 16 pin alternative (just square and triangle >>out) that won't break the bank. >>Thanks >>-Slackmeister > >What is your frequency range? > > ...Jim ThompsonPurely audio band. For audio synth modules.
Reply by ●August 19, 20162016-08-19
On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover <kevinfglover@yahoo.com> wrote:>I have benn trying to find a decent alternative to the LM566 VCO. It >does not seem to be sold anymore at reputable sellers and the ones on >EBay (from China) I don't trust to be authentic or unrecycled. Does >anyone know of a 8 to 16 pin alternative (just square and triangle >out) that won't break the bank. >Thanks >-SlackmeisterLooks like the EXAR XR2206 is still available (at Jameco)... <http://tinyurl.com/5l2k3j> Of course you can make a quite respectable VCO with a 555 Timer and some transistors. This book... <http://makezine.com/2008/08/06/review-the-vco-chip-cookb/> might be helpful to you. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I'm looking for work... see my website.
Reply by ●August 19, 20162016-08-19
On Thursday, August 18, 2016 at 11:43:04 PM UTC-4, Kevin Glover wrote:> On Thu, 18 Aug 2016 20:15:26 -0700, Jim Thompson > <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: > > >On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover > ><kevinfglover@yahoo.com> wrote: > > > >>I have benn trying to find a decent alternative to the LM566 VCO. It > >>does not seem to be sold anymore at reputable sellers and the ones on > >>EBay (from China) I don't trust to be authentic or unrecycled. Does > >>anyone know of a 8 to 16 pin alternative (just square and triangle > >>out) that won't break the bank. > >>Thanks > >>-Slackmeister > > > >What is your frequency range? > > > > ...Jim Thompson > Purely audio band. For audio synth modules.If you are in the US/Canada and only need a few (10-100) I've got a few tubes of ICL8038's. Which I think is the same as the Exar part JT linked to. George H.
Reply by ●August 19, 20162016-08-19
On Fri, 19 Aug 2016 06:55:50 -0700 (PDT), George Herold <gherold@teachspin.com> wrote:>On Thursday, August 18, 2016 at 11:43:04 PM UTC-4, Kevin Glover wrote: >> On Thu, 18 Aug 2016 20:15:26 -0700, Jim Thompson >> <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >> >On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover >> ><kevinfglover@yahoo.com> wrote: >> > >> >>I have benn trying to find a decent alternative to the LM566 VCO. It >> >>does not seem to be sold anymore at reputable sellers and the ones on >> >>EBay (from China) I don't trust to be authentic or unrecycled. Does >> >>anyone know of a 8 to 16 pin alternative (just square and triangle >> >>out) that won't break the bank. >> >>Thanks >> >>-Slackmeister >> > >> >What is your frequency range? >> > >> > ...Jim Thompson >> Purely audio band. For audio synth modules. > >If you are in the US/Canada and only need a few (10-100) I've got a few tubes >of ICL8038's. >Which I think is the same as the Exar part JT linked to. > >George H.I'm experimenting with a VCO cluster(aka Cloud) and need a number of basic VCOs. If you're willing to part with a few, I'm interested. I found some on Amazon but many are from China and one doesn't know if they are new or reclaimed. If yours are new in the tube then I'd be interested. I'm in California. E-Mail me if you wouldn't mind selling a few. Thanks -Kevin
Reply by ●August 19, 20162016-08-19
On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover <kevinfglover@yahoo.com> wrote:>I have benn trying to find a decent alternative to the LM566 VCO. It >does not seem to be sold anymore at reputable sellers and the ones on >EBay (from China) I don't trust to be authentic or unrecycled. Does >anyone know of a 8 to 16 pin alternative (just square and triangle >out) that won't break the bank. >Thanks >-SlackmeisterHave you searched for PLLs and only use the VCO part of it ? Unfortunately, the low pin count devices usually have internal connection between the phase detector and VCO, but try to find one without such internal connection.
Reply by ●August 19, 20162016-08-19
>Have you searched for PLLs and only use the VCO part of it ? >Unfortunately, the low pin count devices usually have internal >connection between the phase detector and VCO, but try to find one >without such internal connection.+1 The VCO of the CD4046 might be a good candidate. It's reasonably linear, though its output is a square wave whose duty cycle isn't that we'll controlled. cheers Phil Hobbs
Reply by ●August 19, 20162016-08-19
On Fri, 19 Aug 2016 23:46:27 +0300, upsidedown@downunder.com wrote:>On Thu, 18 Aug 2016 19:38:30 -0700, Kevin Glover ><kevinfglover@yahoo.com> wrote: > >>I have benn trying to find a decent alternative to the LM566 VCO. It >>does not seem to be sold anymore at reputable sellers and the ones on >>EBay (from China) I don't trust to be authentic or unrecycled. Does >>anyone know of a 8 to 16 pin alternative (just square and triangle >>out) that won't break the bank. >>Thanks >>-Slackmeister > >Have you searched for PLLs and only use the VCO part of it ? >Unfortunately, the low pin count devices usually have internal >connection between the phase detector and VCO, but try to find one >without such internal connection.According to the old (1974) Signetics application note, the NE566 VCO is NE565 PLL with th phase detector disabled. The application note also shows how to control the NE565 VCO by injecting the control _current_ into pin 8, effectively bypassing the PD.
Reply by ●August 19, 20162016-08-19
On Friday, August 19, 2016 at 6:10:43 PM UTC-4, Phil Hobbs wrote:> >Have you searched for PLLs and only use the VCO part of it ? > >Unfortunately, the low pin count devices usually have internal > >connection between the phase detector and VCO, but try to find one > >without such internal connection. > > +1 > > The VCO of the CD4046 might be a good candidate. It's reasonably linear, though its output is a square wave whose duty cycle isn't that we'll controlled. > > cheers > > Phil HobbsYeah and the 74HC4046 is less good. George H.
