IFBP-1IF Buffer for Panadapter with RF Notch 88-108MHz, Universal
This circuit was born from an idea by some US amateur radio operators. Many have replicated the circuit we are presenting in different ways; perhaps the same engineers at Clifton Laboratories have, in turn, adapted and re-elaborated the project they published in past years.
Indeed, for years their IF buffers have no longer been available for connecting a generic SDR DONGLE, or even a branded one, to our beloved radios that, despite being decades old, continue to transmit and excite us, and for this reason, we would like to rejuvenate them in some way.
Many projects have been created for this purpose, but the one we are presenting is probably unique in its kind.
In addition to the well-known electrical characteristics of the DEVICE used, ANALOG DEVICE AD8007, we decided to appropriately implement and adapt a notch filter to eliminate the commercial FM band, which, as many know, is the Achilles' heel of mid-range, and perhaps even high-end, SDR receivers.
Thus, in just 3.5cm x 3.5cm, the RF NOTCH BUFFER for all radios was created.
- Input characteristic impedance > 20kOHM;
- Output impedance stabilized at 50OHM;
- Gain customized based on the type of radio in which it is installed (ask when ordering)
- Equipped with an IPX connector leading to an SMA connector for easy connection of your SDR dongle.
Minimum guaranteed features:
- Reverse isolation >100dB at 30MHz;
- Gain > 6dB
- IP3 > +35dB
- Stop Band FM > 60dB
- Power supply 8-14v (R)
Notch filter cut-off graph 88-108 MHz
Some installation photos from our customers mounting SDR within Kenwood TS-480 and Kenwood TS-990 with Colibrì nano
YAESU FT-450 installation
