Showing posts with label LtSpice. Show all posts
Showing posts with label LtSpice. Show all posts
Sunday, October 22, 2023

DIAL SCALE LINEARITY -- Spreading out the Frequencies for the 15-10 BITX Rig

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Click on the image for a better view The 15-10 Rig has been performing very well, pulling in a lot of DX contacts on both bands.  But there ...
3 comments:
Monday, November 21, 2022

A Homebrew LM386 -- Does Anyone Want to Build It? Help Save Us All from the Indignity of ICs!

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  I recently commented that I was building a discrete LM386 for a Direct Conversion receiver.  I think I was exaggerating my project.  In fa...
8 comments:
Thursday, September 15, 2022

SolderSmoke (Old Smoke) Podcast #103 -- March 15, 2009 -- From Rome -- QRSS, Knights and Wizards, LTSpice, and an Echolink QSO with Jeff KO7M (the guy with the Piper Cub)

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  15 March 2009  Beware the Ides of March! Ostia Beach and Ostia Antica 248 Knights of QRSS. And Wizards! ET Phones Home (with QRSS?) Pos...
Saturday, June 11, 2022

Putting the "Mate for the Mighty Midget" Back to Work -- With a DX-100 on 40 Meter AM

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After working on it for a while I got so fond of my old Hammarlund HQ-100 that I moved it from the AM/Boatanchors operating position over to...
Wednesday, October 13, 2021

SolderSmoke Podcast #233: PIMP, Boatanchors, Novices, MMM, Heathkits, DC Receivers, Mailbag

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SolderSmoke Podcast #233 is available.  http://soldersmoke.com/soldersmoke233.mp3 Travelogue: Cape Cod. SST. Marconi Site. The WFSRA:  ...
7 comments:
Sunday, November 22, 2020

Wrapping up the HA-600A Product Detector Project -- Let's Call Them "Crossed Diode Mixers" NOT "Diode Rings"

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This has been a lot of fun and very educational.   The problem I discovered in the Lafayette HA-600A product detector caused me to take a ne...
7 comments:
Tuesday, November 17, 2020

A Diode Ring Product Detector for the HA-600A? Problems.

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Pete advised me to try this a week or so ago, but it took me a while to follow through and try it out.   I got the two diode, one transforme...
2 comments:
Sunday, August 16, 2020

Fixing up a Radio Shack DX-390 (AKA Sangean ATS-818) While Suffering from Fat Finger Syndrome

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I've had this Radio Shack DX-390 portable receiver since the early 1990s.  I bought it when I was in the Dominican Republic.  It acco...
6 comments:
Thursday, August 6, 2020

How to Sweep, Plot, and Measure Filter Output in LTSpice

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The other day Pete N6QW posted a very nice graph of a bandpass filter's passband.  He was using LTSpice.  I realized I had a serious g...
Monday, January 27, 2020

How to Generate an AM Signal (and DSB!) in LTSpice

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Pretty cool and very useful.   You can also do this by using the Modulator symbol, but I found this technique easier and more straightforw...
Monday, December 16, 2019

YouTube LTSpice Tutorials

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For those who want to get started in circuit simulation, or to improve your use of the LTSpice program: https://www.youtube.com/playlist...
1 comment:
Sunday, June 4, 2017

LTSpice .asc file for the Organic Chip NE602 Rig

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A link to the .asc LTSpice file for the NE602 rig  appears below.   Perhaps some brave soul  more skilled in LTSpice than I am might want to...
3 comments:
Saturday, June 3, 2017

My Organic Chip Rig with an LTSpice Schematic

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CLICK ON IMAGE TO ENLARGE This is a rig that came together through a process of Spontaneous Construction.  It started out with an innoc...
8 comments:
Saturday, February 11, 2017

VK4FFAB's FB Intro to LTSPICE

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Rob VK4FFAB wrote a really nice series on how to get started with the LTSPICE circuit simulator.  I'm sure these articles will also h...
Saturday, January 28, 2017

SolderSmoke Podcast #193: BITX 40, OLEDs, KWM-4, Noise Abatement

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SolderSmoke 193   28 Jan 2017 http://soldersmoke.com/soldersmoke193.mp3 Report from Pete on BITX 40 Session with California ra...
10 comments:
Friday, October 28, 2016

Another Great DSB rig from New Zealand

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So many great Double Sideband projects come from Down Under.  There are the various versions of the famed ZL2BMI rig.   And Peter Parke...
Monday, August 1, 2016

Walking the Plank with N8NM's 60 Meter Rig

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Steve N8NM writes: The free-range rig is coming along!  I'm receiving with decent sensitivity (my generator's only calibrated t...
4 comments:
Saturday, November 21, 2015

SolderSmoke Podcast 182: Bears! MMM Update, On Pete's Bench, 160 AM Dreams, MAILBAG

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N6QW Selfie SolderSmoke Podcast #182 is available http://soldersmoke.com/soldersmoke182.mp3 Travelogue:  In Shenandoah with B...
2 comments:
Wednesday, April 8, 2015

Termination Insensitive BITX Amps

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  Back in 2009 Wes Hayward and Bob Kopski designed a termination insensitive amplifier block for use in BITX-like transceivers. Farhan ur...
Friday, March 23, 2012

NJORP's "Chat with the Designers" Podcast

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N2APB and N2CX of the New Jersey QRP Club have been hosting weekly, live, on-line technical discussions called "Chats with the Designer...
1 comment: