ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

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VE2SCA
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ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

Postby VE2SCA » Sat Apr 17, 2021 1:15 pm

Hi and thanks for reading this.

As the subject says, the L9 toroid is in a pretty bad shape and need replacement. The inductors in this portion of the PCB where too close to each other. So, the result is a loss of power on 20 meters and a electronic burnt smell when it happened but it runs a few years before the problem occurred.

TOASTED_TORROID_3.png
TOASTED_TORROID_3.png (2.93 MiB) Viewed 209 times


Please, can someone tell me where the heck I can get one or two of this 311 nH toroid?

Tried on Digikey and others but for no go.

Maybe is it better to ask Doug W5WC for this?

Thanks Scott - WU2O and others for the ANAN forum and have a great day.

73 de Stephane VE2SCA!
Last edited by VE2SCA on Sat Apr 17, 2021 4:11 pm, edited 2 times in total.
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w-u-2-o
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Re: ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

Postby w-u-2-o » Sat Apr 17, 2021 2:05 pm

Contacting Doug or Apache is probably your best bet.

Or perhaps someone like Kjell @LA2NI might be able to tell you how to wind a new one from scratch.
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VE2SCA
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Re: ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

Postby VE2SCA » Sat Apr 17, 2021 4:16 pm

Ok thank you Scott, I emailed them my request.

Have a nice day and an Happy World Amateur Radio Day 2021 on Sunday, April 18 by the way.

73 de Stephane VE2SCA!
dj1yr
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Re: ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

Postby dj1yr » Sun Apr 18, 2021 4:38 am

Hi,

is an Amidon T50-6 with 9 turns 0,6 or 0,8mm Cul.
Sweep all filters please, especially the filters from 30m are critical.

Then check if the correct filter was switched, there were firmware versions that did not select the correct filter, you can see the result.

The next thing is, the LPF is not built for 100W, 100% duration, max 50W continuous.
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VE2SCA
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Re: ANAN 100B BURNT TOROID L9 ON PA FILTER BOARD

Postby VE2SCA » Sun Apr 18, 2021 1:58 pm

Hi René DJ1YR and everybody.

Thank you for the reply, I managed to get the core online, and the wire here locally.

Special thanks to Doug W5WC that gave me the table of all the core in the radio.

Here's the table FYI:

QTY REF.DES. TOROID TURN WIRE LENGTH

1 L3 T68-2 25 TURN 47.3 CM
1 L4 T68-2 28 TURN 50 CM
1 L5 T50-2 18 TURN 33 CM
1 L6 T50-2 20 TURN 36.8 CM
1 L7 T50-2 15 TURN 28.3 CM
1 L8 T50-2 16 TURN 30 CM
3 L9,L14,L21 T50-6 9 TURN 17.5 CM
1 L10 T50-6 12 TURN 22.5 CM
1 L13 T50-6 8 TURN 17 CM
1 L15 T50-6 6 TURN 13.9 CM
1 L16 T50-6 7 TURN 16.2 CM
1 L17 T50-10 8 TURN 17 CM
2 L18,L22 T50-10 7 TURN 16.2 CM
2 T4,T5 FT50-43 20 TURN 36.8 CM
1 T3 FT37-43 12 TURN 19.6 CM
1 L23 FT50-43 10 TURN 21 CM

Thanks again and have a nice day.

73 de Stephane VE2SCA

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