[TowerTalk] Voltage Breakdown For Enameled Wire

SLee gwy4ever at gmail.com
Mon Jan 29 04:35:21 EST 2018

Greetings to all,
I agree with Grant Saviers, KZ1W, on recommending Tempco magnet-wire. 
Tempco guarantees their product to be USA manufactured. I use their 
GP/MR-200 grade magnet-wire rather than the Soderon155. GP/MR- 200 is 
temperature rated to 200°C, chemical resistant, with a minimum breakdown 
voltage of 4,275 volts at 200° and 5,700 volts at room temperature. 
Average rated breakdown voltage at 200°C is 10.3 KV.  I've been using 
this particular wire in 12, 14, 18, and 24 gauge for many years now (in 
non-ham technical applications) with zero issues.  Fresh #31 and #43 
cores are arriving tomorrow from Arrow.com so I'll be winding some 
chokes here shortly.  Amps on hand include an old Heathkit HL2200 plus 
an Ameritron AL-80B; neither of which get operated beyond 700 watts. So 
expectations here are high for positive results.


Something to consider:  The insulation on Soderon155 acts as a flux upon 
soldering therefore it need not be prepped for soldering.  In contrast, 
GP/MR-200 insulation must be mechanically removed prior to soldering.    
Stephen Lee, N7RV

On 1/28/2018 6:02 PM, Jim Brown wrote:
> I'm once again considering winding high power chokes with enameled wire.
> < SLee snipped original msg for brevity>
> Suggestions? 73, Jim K9YC

More information about the TowerTalk mailing list