I have a stack of two T-225A-2 as the low band tank coil in my QRO HF2000 (2 x
3-500z). It does get quite warm on extended key down but so far no failure.
John
AI6LY
Get Outlook for Android<https://aka.ms/AAb9ysg>
________________________________
From: Amps <amps-bounces@contesting.com> on behalf of Bill Smith via Amps
<amps@contesting.com>
Sent: Tuesday, June 29, 2021 7:24:40 AM
To: amps@contesting.com <amps@contesting.com>
Subject: [Amps] Swan Mark 1 on 160 meters
Considering adding 160 meters to my Swan Mark 1 amplifier. The power supply
and RF deck were overhauled in 2003. At that time a new transformer was also
added to replace the shorted out original one. Since the RF deck was barren
when I got it I added a Radio Switch 86 bandswitch and new tank coils. It
works well 80-10 meters using the original 3-400Z tubes.
Thought I would use the instructions for adding 160 to the Heathkit 220. The
bandswitch has an extra contacts I could use so no relays would be required.
My question is would Toroid core type tank coil work in this application or
would it overheat? I've seen recommendations for using a Amidon T-225A-2
powdered-iron toroidal core.
Thanks,Bill KO4NR
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|