I'm thinking of using the crystals from a few scrapped
Heath HR-10 receivers (cheap half lattice design) in
a cascaded half-lattice or in a full lattice filter for a
receiver project. I've found tons of info on half-lattice
design, but the full lattice info has been a problem--
anyone have any links to articles in the vintage QSTs?
I have the CDs..

Pete

On Dec 20, 7:33*am, "Tio Pedro" wrote:
I'm thinking of using the crystals from a few scrapped
Heath HR-10 receivers (cheap half lattice design) in
a cascaded half-lattice or in a full lattice filter for a
receiver project. I've found tons of info on half-lattice
design, but the full lattice info has been a problem--
anyone have any links to articles in the vintage QSTs?
I have the CDs..

Pete

Hola, Pedro,

I could scan sections about full lattice filters from Zverev and from
Van Valkenburg into PDFs, if you're interested. For Van Valkenburg,
it's a whole chapter. It would then be left as a "small exercise" to
go from their math to what you want. I suspect a Spice simulation
would be appropriate.

Cheers,
Tom

"K7ITM" wrote in message
...
On Dec 20, 7:33 am, "Tio Pedro" wrote:
I'm thinking of using the crystals from a few scrapped
Heath HR-10 receivers (cheap half lattice design) in
a cascaded half-lattice or in a full lattice filter for a
receiver project. I've found tons of info on half-lattice
design, but the full lattice info has been a problem--
anyone have any links to articles in the vintage QSTs?
I have the CDs..

Pete

Hola, Pedro,

I could scan sections about full lattice filters from Zverev and from
Van Valkenburg into PDFs, if you're interested. For Van Valkenburg,
it's a whole chapter. It would then be left as a "small exercise" to
go from their math to what you want. I suspect a Spice simulation
would be appropriate.

Cheers,
Tom

Hi Tom, nothing that design heavy... I have to work with the parts
I have, and was looking for some practical guidance on the subject.
I'll have to dig into the old SSB Handbook and see if the QST
references will uncover any leads.

Pete k1zjh

I've figured out to use QST View... Finally! And was able to
dig up quite a few articles from the 50s into the early 60s.
I have enough reading matter to come to some conclusions..

Pete