Results tagged #Vfo in Circuits
160 METER VFO
Standard Colpitts oscillator Q1 with emitter-follower Q2 gives dependability and adequate isolation from later stages Zener regulation provi...
10 MHz VFO
Values shown for high-stability variable-frequency oscillator give operation in 10-MHz range. Stable supply voltage is essential. Use silver...
LOW DRIFT 7MHz VFO
Low-drift solid-state design for 40-meter band has maximum change of only 25 Hz from cold start to full warm-up at 25?. After stabilization,...
LOW DRIFT 7MHz VFO
Low-drift solid-state design for 40-meter band has maximum change of only 25 Hz from cold start to full warm-up at 25?. After stabilization,...
VFO oscillator circuit
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VFO circut
Building VFOs in 2011 might seem an irrelevant exercise given the move to and evolution of digital signal generators laden with bells and wh...
QRP VFOs
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Multi-Purpose VFO
The Frequency instability in VFO stage is a common problem. This is usually occurred in VFO`s due to low Q of the tank circuit, capacitor...
10.58 to 10.74 mhz vfo oscillator circuit
Figure 1 shows the 10. 58 to 10. 74 MHz VFO oscillator circuit. Yes, this is the same circuit that was presented last, but I`ve re-designed ...
40 m band direct conversion
You may admit abounding of the date circuits - as they are agnate to those acclimated in some of my added projects. The VFO and the RF ascri...
1058 to 1074 mhz vfo oscillator circuit
I`ve re-drawn it to appearance the Colpitts oscillator added clearly. L is about 1. 5 uH; 19 turns in a T50-6 amount (yellow). The amount ...
vackar vfo oscillator
It is probably the most stable VFO oscillator known. Vackar configuration is rarely used because of known reason. (The NIH, not-invented-her...
Ham Band Vfo Circuit
This basic VFO for the 3- to 6-MHz range is coirimonly used in amateur applications, using a Colpitis circuit. For 5 to 5.5 MHz, C = C2 = 7...
6.5Mhz Vfo Circuit
Fixed-value capacitors are disc ceramics. CI, C4, C5, C6, and C8 are NPO ceramic or polystyrene. C2 is a 25-pF ceramic trimmer and C3 is a ...
Adjustable Vfo Temperature Compensator Circuit
Use of a differential capacitor allows temperature compensation of LC circuit using an NFO and N1500 ceramic. C6 is a differential capacito...
Stable Vfo
This VFO circuit covers from 2.13 to 2.58 MHz and is intended for use with an external mixer to heterodyne the signal to desired...
7 MHz VFO
A 7 MHz oscillator with a variable crystal oscillator (VXO) operates very stably, but it allows only a small frequency variation (approx. 5 ...
V.F.O. for H.F with PLL
This project arises from the need to home-build a valid tuning control for a multi band transceiver.
It consists of a partial syntesis V.F....
VFO stabilization with 2N4416
The coil is about 25 turns #28 wire on a T-44-6 core, tapped at about 5 turns. I'm too lazy to open my VFO and count it for you -- besides, ...
VFO stabilization with 2N4416
The coil is about 25 turns #28 wire on a T-44-6 core, tapped at about 5 turns. I'm too lazy to open my VFO and count it for you -- besides, ...