With a lot of help from some of the other time-nuts, I've been working
on a follow-on to the TADD-1. Progress has been non-existent for the
past several months, but the initial prototype met the goals of very low
phase noise and very high isolation. However, it will probably be more
expensive per-channel than the TADD-1, and we may not be able to fit six
channels into the TADD form factor. Most likely, it'll be a four
channel design, but you will be able to daisy-chain across the input stages.
No promises when progress will resume, but it *is* going to happen...
John
----
Chris Caudle said the following on 09/19/2009 06:13 PM:
On Tue, August 18, 2009 1:28 pm, Gerhard Hoffmann wrote:
I have done a new incarnation of my discrete NIST-flavoured
distribution amplifier. The input return loss still needs
to be cleaned up, then it's ready for publication.
I have been interested in this, the time lag made me afraid you were not
going to publish any additional details.
What other distribution amp plans or kits are others aware of? I know of
the TAPR TADD design, which is op-amp based, and the G4HUP design, which
is based on MMIC devices. The design Hoffmann is working on is the first
I have seen based on optimized discrete devices (assuming that eventually
full schematics and Gerber files are published, to be able to consider it
in the "kit" category, even if I have to get my own PCB's built).
Are there others which I just have not seen yet?
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