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ZS6RO > HBREW 04.01.03 14:06l 53 Lines 1675 Bytes #999 (0) @ INET
BID : 21329_ZS1RO
Read: ON4TVT GUEST
Subj: Re: SPICE circuit simulation (with tubes)
Path: ON0AR<ON0AR<ON0BEL<CX2ACB<KP4IG<ZS6RO<ZS6RO
Sent: 030103/1939Z @:ZS6RO.SRJ.GAU.ZAF.AF #:21329 [Johannesburg] InterGate
RO
** NEWSGROUP: rec.radio.amateur.homebrew
** FROM : "Bob Camp" <bob@cq.nu>
Hi,
Even with a simulation coming up with the output level of a typical sine
wave oscillator is pretty tough.
Most approaches wind up being
1) I know this current (or voltage) is = X
2) I simulate the circuit
3) I adjust the simulation so the current (or voltage) is right
4) I read off the output when the simulation is running that way
The problem is that if you don't already know the magic current or voltage
level you are stuck. Knowing the magic level pretty much implies that you
have the circuit running in front of you.
Take Care!
Bob Camp
KB8TQ
"Richard" <nearlynews_email@ntlworld.com> wrote in message
news:auurce$affe1$1@ID-150848.news.dfncis.de...
>
> "Richard" <nearlynews_email@ntlworld.com> wrote in message
> news:auul6e$8m0ih$1@ID-150848.news.dfncis.de...
> > Hi. I hardly know anything about SPICE (or electronics for that
> > matter), but I've been tring to find stuff on the web about tube RF
> > circuit simulation using SPICE. Not found much. Anyone know of any
> > sites on the subject? I've seen audio tube models, but not much data
> > for RF pentodes.
> >
> > I'd like to simulate a local oscillator that uses a CV327 (EF52), and
> > the mixer that uses a CV302 (ECH22). I won't hold my breath. :c) TIA.
> > Rich.
>
> Actually I'm not designing, but mainly just want to know the local osc.
> output. Probably simpler to just build up the circuit, get some test
> gear and measure the output. But, would be an interesting
> diversion/project to use SPICE.
>
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