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Toroidal transformer values, toroids, windings, #ubitx #ubitx-help #parts

 

Hi all,

I'm about to embark on my first homebrew transceiver and have chosen the uBITX. I am lucky to have been given access to a large collection of unwanted though-hole components as we have gradually moved to surface mount at my company. For this reason, I am looking to do a project similar to this:??

My questions for now all regard the toroidal transformers. I can't find any info about these.

1. What toroids are used?
2. How many wraps of wire?
3. Are there any off-the-shelf alternatives anyone knows of should I choose to buy them?

Thanks for the help.

?
 

coil details are toward the bottom of
--

 

Can't believe I missed that. Thanks!
jim
 

From the uBITX website "circuit details" section :

Coil Details

  • L5, ?L7?: 12 turns on T30-6
  • L1, L2, L3, L4, L11, L12, L13?: 9 turns on T30-6
  • L14, L15, L16: ?10 turns on T30-6
  • L14, L15, L16: ?14 turns on T30-6
  • L20, L21, L22: 19 turns on T30-6

All the RF transfomers are 8-10 trifilar turns on FT37-43

Jim

On Monday, October 8, 2018, 11:24:09 AM PDT, cburf1@... <cburf1@...> wrote:


Hi all,

I'm about to embark on my first homebrew transceiver and have chosen the uBITX. I am lucky to have been given access to a large collection of unwanted though-hole components as we have gradually moved to surface mount at my company. For this reason, I am looking to do a project similar to this:??

My questions for now all regard the toroidal transformers. I can't find any info about these.

1. What toroids are used?
2. How many wraps of wire?
3. Are there any off-the-shelf alternatives anyone knows of should I choose to buy them?

Thanks for the help.

?

 

Info is nice
always go by inductance values for tuned circuits as per sch
but not mechanical turns wound. If you wind same, needed inductance
has to be checked and tweaked.


On Tue, Oct 9, 2018 at 10:06 PM jim via Groups.Io
<ab7vf@...> wrote:

From the uBITX website "circuit details" section :

Coil Details

L5, L7 : 12 turns on T30-6
L1, L2, L3, L4, L11, L12, L13 : 9 turns on T30-6
L14, L15, L16: 10 turns on T30-6
L14, L15, L16: 14 turns on T30-6
L20, L21, L22: 19 turns on T30-6

All the RF transfomers are 8-10 trifilar turns on FT37-43

Jim

On Monday, October 8, 2018, 11:24:09 AM PDT, cburf1@... <cburf1@...> wrote:


Hi all,

I'm about to embark on my first homebrew transceiver and have chosen the uBITX. I am lucky to have been given access to a large collection of unwanted though-hole components as we have gradually moved to surface mount at my company. For this reason, I am looking to do a project similar to this:

My questions for now all regard the toroidal transformers. I can't find any info about these.

1. What toroids are used?
2. How many wraps of wire?
3. Are there any off-the-shelf alternatives anyone knows of should I choose to buy them?

Thanks for the help.

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