Visitor's Tech Banner

Visitors Technical Articles

Font Decrease Font Increase



Newest! Design of a Regen Rx for the SW Bands - A Tutorial and Design Guide for Experimental Work Part-I PDF By Ramon Vargas.

Newest! Design of a Regen Rx for the SW Bands - A Tutorial and Design Guide for Experimental Work-Part II_v2 PDF By Ramon Vargas.

RC Phase Shift Oscillators PDF By Ramon Vargas.

Receptores de Onda Media para el Aficionado PDF de Ramon Vargas

Output valve transformers using power transformers spreadsheet nick-transformers.xls and the explanations file nick-valvetransformers.doc, by Nick Strong G0CWA

Nick Strong's (G0CWA) Mystery coil spreadsheetnick-mystery.xls and the explanations file Simplified-method-for-calculating-mystery-crystal-radio-coils.doc.

Analysis of the Tuggle Front End, Part I, by Ramon Vargas (HTML)
Download Analysis of the Tuggle Front End in .doc format (101k).

Analysis%20of%20the%20Tuggle%20Front%20End,%20part%20II, by Ramon Vargas (HTML)
Download Analysis of the Tuggle Front End, Part II in .doc format (302k).

Analysis%20of%20the%20Tuggle%20Front%20End,%20part%20III, by Ramon Vargas (HTML)
Download Analysis of the Tuggle Front End, Part III (.doc 833k).

Directional Couplers by Ramon Vargas. (.pdf 98k)

A Low-Frequency Crystal Controlled Oscillator by Ramon Vargas (.doc 69k)

Wien-Bridge oscillator has simplified frequency control, by Ramon Vargas (PDF 316k)

Q Multiplication in the Wien-bridge OscillatorBy Ramon Vargas (PDF 254k)

The James-Baxandall Passive Tone-Control Network by Ramon Vargas (HTML)
DownloadThe_James-Baxandall_Passive_Tone_Control_Network.doc (550k)

Diode Charge Pump AM-FM Demodulators, By Ramon Vargas (PDF 270k)

Optimal Loading of Audio Transformers for Crystal Set Use, By Ramon Vargas (HTML)
Download Optimal Loading of Audio Transformers for Crystal Set Use.doc (230k)

Crystal Receivers for the MW-AM band, By Ramon Vargas (PDF 205k)

Notes on Demodulation of AM Signals, By Ramon Vargas (PDF 34k)

Bogen T-725 Revised Calculations, By Ramon Vargas (PDF 209k)

Oscillations and Regenerative Amplification using Negative Resistance Devices , By Ramon Vargas (PDF 265k)

Voltage Comparator and Q Multiplier make a stable Sine Wave Oscillator , By Ramon Vargas (PDF 86k)

The Modern Armstrong Regenerative Receiver By Ramon Vargas. download (PDF 38k)

Small Signal Calculation of a SW RF Stage updtd.pdf By Ramon Vargas (PDF 151k)

Ferrite Rod Inductance By Dan McGillis (PDF 146k)

Analysis and Applications of the Capacitive Transformer By Ramon Vargas (PDF 137k)

On The Reduction Of Detector Diode Losses By Ramon Vargas (PDF 482k)

Optimization of the LD-L Ratio of a Selectivity-Enhanced Ge-Detector Xtal Radio By Ramon Vargas (PDF 417k)

An Improved Shortwave Regenerative Receiver By Ramon Vargas (PDF 1.8 mb)

Electronic Parts Available