LA2YUA – RF and related projects

To investigate a simple way of generating local oscillators for my UHF transmitter, the CDCR83 was put on a 4 layer board and fed with frequencies from 10-150 MHz at various multiplication settings. As usual a bag of these was found on eBay and as such there was some incentive to find a use for them.

Background: a set of 110.51 MHz filters were acquired on eBay per usual, and I ended up with around 400 of them. Part number was 110E39. No data sheet was available, though a potentially related data sheet for 90 MHz filters in the same package was available from NDK. Here…

The 8802A transmitter is a 50W continuous 450 MHz modulator, exciter and PA with good performance.

The 8801A receiver is very similar to the F955 receiver, so a lot of the technical documentation can be referenced: http://www.jancorver.org/en/ombouw/ericsson/f955/

The main manual is in Dutch, but it’s still somewhat understandable due to the excellent diagrams drawn by PA0IB.

This is an overview of my documentation for the Magnetic AB/Ericsson NMT 450 base station transceiver system.