Re: T41 BPF results
¿ªÔÆÌåÓýNot its time to do it for the LPF too¡ and a section on winding that line section transformer and how to make the Power and SWR measurement work. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Tuesday, February 18, 2025 7:56 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] T41 BPF results ? Nice. Very complete. Is the term "stacked" explained in the manual? ? Jack, W8TEE ? On Tuesday, February 18, 2025 at 08:35:10 PM EST, K9HZ <bill@...> wrote: ? ? I just put this together today and added it to the back of the Assembly Manual.? Makes it easier to see everything in one place.? The next thing I¡¯ll make and add is a test sheet for measured vs expected performance. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io ? Justin's manual has a similar table in it, but not the wire lengths. Because the BPF's use the smaller wire, the wire length in Kit and Parts should be very close to what you need. For example, L091 calls for a T37-6 core with 25 turns. From their table: ? ? ??????? T-37 Core???????????? Length
? 25 turns on a T-37 core takes 14.5". (Simple average of the turn count.)? I would wind one core and see how that works out for the pigtail leads. Adjust as needed. ? Jack, W8TEE ?
? ? On Tuesday, February 18, 2025 at 04:37:44 PM EST, Tim via groups.io <w4yn@...> wrote: ? ? Jack Is there a similar sheet? for BPF's? LPF sheet is working out great Tim W4YN
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