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BV-613 various questions
Mondial
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#13

12-21-2013, 08:17 PM
One thing I have been thinking of is replacing the 3055's with IRF1010N power mosfets. The 3055's have a saturation voltage of over 1.1 V at a collector current of 4 Amps, which amounts to a lot of heat dissipation, more than 4 watts combined. The 1.1 V of drop also becomes pretty significant when you are starting out with only 6 V of supply.

The mosfets have an on resistance of only .011 Ohm, so total power dissipated drops to .176 watt at the same 4 A current. This is probably better than the original mechanical contacts as far as loss is concerned.

Might be worth giving a try...?
(This post was last modified: 12-21-2013, 09:03 PM by Mondial.)
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Messages In This Thread
BV-613 various questions - by 64EK26 - 11-08-2013, 01:49 PM
RE: BV-613 various questions - by BrendaAnnD - 11-08-2013, 03:33 PM
RE: BV-613 various questions - by 64EK26 - 11-08-2013, 06:27 PM
RE: BV-613 various questions - by BrendaAnnD - 11-08-2013, 07:19 PM
RE: BV-611 restoration - by 64EK26 - 12-19-2013, 03:38 PM
RE: BV-613 various questions - by codefox1 - 12-19-2013, 06:09 PM
RE: BV-613 various questions - by Mondial - 12-19-2013, 10:36 PM
RE: BV-613 various questions - by 64EK26 - 12-20-2013, 01:50 PM
RE: BV-613 various questions - by morzh - 12-20-2013, 02:41 PM
RE: BV-613 various questions - by 64EK26 - 12-20-2013, 04:04 PM
RE: BV-613 various questions - by Mondial - 12-20-2013, 06:03 PM
RE: BV-613 various questions - by 64EK26 - 12-21-2013, 04:15 PM
RE: BV-613 various questions - by Mondial - 12-21-2013, 08:17 PM
RE: BV-613 various questions - by klondike98 - 08-19-2017, 10:45 AM
RE: BV-613 various questions - by Radioroslyn - 08-19-2017, 12:03 PM
RE: BV-613 various questions - by Cesardeluxe - 10-14-2018, 04:03 PM
RE: BV-613 various questions - by Cesardeluxe - 11-05-2018, 07:26 AM
RE: BV-613 various questions - by klondike98 - 11-05-2018, 08:58 AM
RE: BV-613 various questions - by Radioroslyn - 11-05-2018, 12:42 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
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