Willamette Transceiver
I recently received a couple of excellent photos of completed Willamette transceivers, and I just can't help but brag on these wonderful creations. W8BH completed his rig quite a while ago but recently upgraded it by adding a KD1JV digital dial. Looks very sharp, Bruce! I'm really getting a kick out of this one. K3PG, [...]
I'm very pleased to report the first (to my knowledge) completed Willamette transceiver which was born in Europe. Vincenzo, IZ5GVP sent along to me a couple of photos of his very nicely constructed Willamette. He reports that it works well and that he's considering modifying it to operate on the 30 meter band. Three cheers [...]
Thanks to some prompting from a Willamette builder who inquired about some performance issues with his rig, I was able to identify an error in the bill of materials which causes a significant degradation in receiver sensitivity. Fortunately the fix for this problem is very simple. Audio preamplifier collector resistor R49 was incorrectly called out [...]
As I mentioned in a previous post, I did the calculations to change the AF filter in the Willamette from a low-pass filter with a 3.3 kHz cutoff to a peaked low-pass filter with a cutoff frequency nearer to 1 kHz. I finally got around to implementing the mod last night and got a chance [...]
This weekend, two of the first wave of Willamette builders posted some photos of their completed rigs to the qrp-l.org mailing list. I present to you some of these great pictures with the permission of the builders. First up is the excellent work of Chris Howard, W0EP. Chris placed his finshed rig in a very [...]
A few different things have conspired to bring me back around to finish up the documentation for the Willamette, as well as forcing me to re-examine a few elements of the rig design. One of those things was an e-mail from AA0ZZ (really cool to hear from the designer of the PIC-EL and the IQPro) [...]
Continue reading about Another Look at the Willamette AF Filter
