In my complementary power amplifier I do not need toroids so far, but in my LF VSWR meter I am using an Amidon (Manufacturer being FairRite, USA) FT50-77 but in the base of my antenna I am employing
One promising looking core for the kiloWatt region is the ETD54 and ETD59 sizes in 3C90 available from Farnell. and are specified for use up to 200kHz. What about EHT transformer cores salvaged from
N87 or N67 is a better material than 3C85 now. Also 3E5 and 3F3 and 3C90. In fact any ferrite meaterial specified as being suitable for power transformers. I don't know if torroid cores are available
<< I have a problem with 3C85 toroids...it's unpossible to buy it in Slovakia. >> Hi All. Having recovered from this shock......I called the distributor who confirmed that 3C85 has been discontinued.
Hi LF-ers... I have a problem with 3C85 toroids...it's unpossible to buy it in Slovakia. But a lot of Amidon and Pramet (Czech company) toroids are available. I think an equivalent of 3C85 is Amidon
Yes - that's why I'm engineering it so the PTT line operates the chip reset pin and only brings the PSU up via its soft-start on transmit. 'JNT Very wise Nick
Yes - that's why I'm engineering it so the PTT line operates the chip reset pin and only brings the PSU up via its soft-start on transmit. 'JNT Good reason, it is just that the EMC engineer in me has
A pair of car batteries used on a /P expedition could easily discharge to 20V. The modern high power DMOS devices (for 1.3, 2.3 and 3.4 GHz) that this PSU is aimed at powering like a constant 28V Vcc
A pair of car batteries used on a /P expedition could easily discharge to 20V. The modern high power DMOS devices (for 1.3, 2.3 and 3.4 GHz) that this PSU is aimed at powering like a constant 28V Vcc
As part of a project for the other end of the spectrum, I'm in the process of designing a 300 - 400W SMPSU for converting a 12V car battery supply to 28V so will be looking into similar sized cores
