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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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 Posted: Thu Jul 14, 2005 4:41 pm Post subject: Generic ASC files |
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Place your generic files here as starting blocks for others.
| Description: |
| This is a LCL coupled 6SN7 which shows the same behavior as parafeed. |
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| Filename: |
6SN7 LCL coupled.asc |
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1.62 KB |
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374 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Thu Jul 14, 2005 6:49 pm Post subject: |
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a parafeed linestage with a 76 and a 2:1 output.
| Description: |
| The basic parafeed model. |
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| Filename: |
parafeed 76.asc |
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1.91 KB |
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406 Time(s) |
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nickg
Joined: 19 Mar 2005
Posts: 26
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| Posted: Fri Jul 15, 2005 12:57 am Post subject: |
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Hopefully its of use, a standard three stage RIAA stage, with inverse RIAA on the input.
Usefull for finding the effect of changing the RIAA values.
| Description: |
| Three stage 12ax7 basic phono pre |
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| Filename: |
ThreeStagePhono.asc |
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4.96 KB |
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455 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Thu Sep 01, 2005 4:02 pm Post subject: 14 step autoformer |
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LT spice file for the 14 step autoformer.
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| Filename: |
FORMER.ASC |
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6.52 KB |
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433 Time(s) |
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Andrew
Joined: 26 Apr 2006
Posts: 197
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| Posted: Thu Apr 27, 2006 12:09 pm Post subject: Passive Inverse RIAA |
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A Passive Inverse RIAA made up from an RC network. The maths is courtesy of Jim Hagerman's paper "On Reference RIAA Networks" output can either be -40db or -60db.
cheers,
-- Andrew
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| Filename: |
passive_inverse_riaa.asc |
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1.15 KB |
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336 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Mon Jul 03, 2006 1:08 am Post subject: RCL coupled 6SN7 |
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This allows easy changing of the L, C and cathode bypass.
| Description: |
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| Filename: |
6SN7 RCL coupled.asc |
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2.2 KB |
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421 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Tue Sep 18, 2007 7:15 pm Post subject: Simple Bridge PS. |
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This is from Nickel Core over on the asylum. The discussion is about the cap across the secondary.
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| Filename: |
PSU2.asc |
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2.04 KB |
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342 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Wed Aug 06, 2008 4:02 am Post subject: a simple 12dB lowpass with some instructions |
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If you download LTspice and run this file you should get immediate results.
| Description: |
| basic file with some very basic instructions. |
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| Filename: |
12dB_Lowpass.asc |
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1.71 KB |
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212 Time(s) |
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Naz
Joined: 06 Aug 2008
Posts: 45
Location: Sydney Australia
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| Posted: Wed Aug 06, 2008 6:43 am Post subject: Distortion Cancellation in a SET |
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This file demonstrates the effect of distortion cancellation between driver and OP stages in a SET amp. The circuit is not intended to be an optimum design for DIY but highlights the benefit of finding well-matched tubes and careful selection of their operating points.
Since most of the distortion is generated by loading of the OP tube, less linear driver tubes operating at lower current tend to work best. The increased distortion created by these conditions is 180 deg out of phase with the OP giving rise to some cancellation, mainly in the lower harmonics.
In this DC coupled example, the local NFB caused by the OP tube's RK also plays a role to help completely cancel lower order harmonics. Change the operating points to see the effect using fft to view.
You will need the attached file dmtriodep.inc in case you don't have it.
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dmtriodep.inc |
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15.49 KB |
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197 Time(s) |
| Description: |
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| Filename: |
2A3_Distortion Cancellation.asc |
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3.05 KB |
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172 Time(s) |
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Nickel Core
Joined: 26 Sep 2007
Posts: 14
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| Posted: Wed Aug 06, 2008 12:10 pm Post subject: Another setup... |
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A cap / IT coupled 3 stage amplifier where the bias is stepped in the driver stage to see if there are any harmonic cancellation effects in such a setup.
| Description: |
| The file includes some models of less well known tubes like the Siemens Ba. |
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| Filename: |
dmtriodep.inc |
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25.35 KB |
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201 Time(s) |
| Description: |
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| Filename: |
dist_cancellation.asc |
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3.75 KB |
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173 Time(s) |
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dave slagle
Joined: 22 Jan 2005
Posts: 1357
Location: NYC
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| Posted: Mon Apr 19, 2010 6:17 pm Post subject: Tuned Choke |
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Simple tuned choke file to look at the harmonics created.
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| Filename: |
tuned choke.asc |
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3.39 KB |
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56 Time(s) |
_________________
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Naz
Joined: 06 Aug 2008
Posts: 45
Location: Sydney Australia
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| Posted: Tue Apr 20, 2010 12:20 am Post subject: |
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Dave, this is consistent with my findings in the real and Simmed world. Definitely worth a try and perhaps some experimentation with lower C and L values.
Naz
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151.22 KB |
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660 Time(s) |
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