Category: Si5351A

“Gimme Five” reloaded – A compact 5 band QRP SSB transceiver in SMD technology: VFO, LO, MCU etc.

As mentioned in the introductory article to this radio the digital components in this transceiver are pre-manufactured modules that have only been put together in a more or less sensible way. ;-). These modules are: AD9850 as variable frequency oscillator (VFO), China made no-name board, Si5351 as local oscillator (LO) produced by “Adafruit”, Arduino Pro…

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“Gimme Five” reloaded – A compact 5 band QRP SSB transceiver in SMD technology

Follow-up articles published so far: Digital and analog main units: VFO, Local oscillator, Display, TX-Gain control Receiver unit Transmitter unit Abstract A compact SSB transmitter/receiver will be presented. This unit covers 5 bands within the amateur radio spectrum (3.5, 7, 14, 21 and 28 MHz). Receiver is a single conversion unit with an interfrequency of…

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Shrinking a QRP transceiver to (nearly) the size of a pack of cigarettes

Hint: This article is only a preview to this miniature sideband transceiver. The full description can be found here: https://dk7ih.de/2019/04/22/revision-of-the-cigarette-pack-transceiver/ The challenge started some weeks ago, when John, ZL2TCA, commented to this blog you next challange is to build a rig into a cigerette packet size case. My problem: I don’t smoke, have never smoked…

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