Re: [volt-nuts] DAS-46

Jerry wrote: One of the items I am having trouble modeling is a CLD, current limiting diode, MCL1302. CLDs are almost always operated in saturation, so a behavioral current source of the appropriate value should model it just fine for your needs (spec for the MCL1302 is 2mA +/- 0.6mA -- as

Re: [volt-nuts] DAS-46

Well, you aren’t going to believe this, but I’ve checked the circuit about 10 times now and it looks pretty good. I then used Charles advice and imported the CCL2000 CLD. I ran the model and it swung to the negative rail to almost the exact voltage I am getting with the real circuit of

Re: [volt-nuts] DAS-46

Charles, thank you! Very helpful, as everyone has been. > On Jan 29, 2017, at 6:38 PM, Charles Steinmetz wrote: > > Jerry wrote: > >> One of the items I am having trouble modeling is a CLD, current limiting >> diode, MCL1302. > > CLDs are almost always operated in

Re: [volt-nuts] DAS-46

Yes, and I assume you would need an FET that acted like the CLD. I believe the MCL1302 is a 2mA device. I doubt I’[ll get the model working, which would be ideal. > On Jan 29, 2017, at 3:20 PM, Bruce Griffiths > wrote: > > A CLD is merely a JFET with the gate

Re: [volt-nuts] DAS-46

A CLD is merely a JFET with the gate connected to the source.Sometimes a source resistor may be included with the gate connected to the opposite end of the resistor to the end connected to the source. Bruce On Monday, 30 January 2017 12:12 PM, Jerry Hancock wrote:

[volt-nuts] DAS-46

One of the items I am having trouble modeling is a CLD, current limiting diode, MCL1302. The CLDs are used between he base and collectors on the output stage 2n2219 / 2n2905. I swapped them on the board with no impact on the problem. I can’t find CLDs in LTSPICE. The other diode I can’t

Re: [volt-nuts] DAS46 manual

Thanks for the manuals, guys, though I appreciate you sending them I have them all including one from the parent company. You’ll notice in the manuals that the CSA isn’t detailed. As Charles pointed out in a note to me, the ECG220 as a replacement could be the issue. There is a guy online

Re: [volt-nuts] DAS-46

Jerry wrote: I traced the issue to a Chopper Stabilized Amp on the back of the power supply board. Unfortunately, the CSA has no schematic supplied. If it fails, it is to be replaced. I’ve been trying to reverse engineer it into LTSpice without luck. There are two FETs, MFE3002 that cross