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Mosfets
- Thread starter HomerBB
- Start date
The 9530 is an upgrade for the 7530 commonly seen in the RM Italy amps. Seems like there was an export radio using the 9530 as well.
Not familiar with the other two. I normally only repair 2sc2879 and blf188 amps but I have done a few RM's in the past.
Thanks.
I'm asking because I came into some of these from a silent key widow. I promised to market them and wondered if they had any value. They seem pricey online.
I have 10 of the ERF9530, 2 of the MRF300an, and 2 of the MRF300bn.
I thought they were amplifier related as he worked on such equipment before he passed.
I'm asking because I came into some of these from a silent key widow. I promised to market them and wondered if they had any value. They seem pricey online.
I have 10 of the ERF9530, 2 of the MRF300an, and 2 of the MRF300bn.
I thought they were amplifier related as he worked on such equipment before he passed.
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The ERF9530 was not designed as a RF power amplifier. Its original purpose was to switch DC power-supply current, typically in a switchmode regulator circuit. But it was adapted to use as a RF power amplifier because that type part is produced in large quantities cheap.
The MRF300 is a 300-Watt transistor meant for use as a RF power amplifier. The ERF 9530 will barely multiply the driver power by a factor of six or seven to one. The power gain of the MRF300 parts is closer to 100 to one, more or less. The A and B versions are identical on the inside, but have the pin assignments in mirror image. This simplifies circuit board design when using a pair of them in a push-pull circuit, one on each side of the input and output transformers.
They're sold by Mouser. Not sure of the current retail prices.
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The MRF300 is a 300-Watt transistor meant for use as a RF power amplifier. The ERF 9530 will barely multiply the driver power by a factor of six or seven to one. The power gain of the MRF300 parts is closer to 100 to one, more or less. The A and B versions are identical on the inside, but have the pin assignments in mirror image. This simplifies circuit board design when using a pair of them in a push-pull circuit, one on each side of the input and output transformers.
They're sold by Mouser. Not sure of the current retail prices.
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I just looked into an amp I also got from the widow that has 4 of the ERF9530s in it. It must be one of those adaptations.
I won't use them, but I'd sell them cheap (as I said I would) if anyone is in the market. I just didn't know whether they are desirable.
I won't use them, but I'd sell them cheap (as I said I would) if anyone is in the market. I just didn't know whether they are desirable.
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If i understand correctly, you're talking about the ERF9530 and not the irf9530 if so I'm interested in a few.
Those are the ones sold as "Palomar" by Eric Lewis or now Palomar electronics. They're used in the Palomar rfx-95hd or the rocket box amps.
I wouldn't mind buying a few to have as replacements for my rfx-95.
I believe you are correct about them being ERF9530 (The amp I mentioned looking into is a Rocket Box HD500 MOS). At Walmart right now. When I get home I'll confirm it.
There is also this thing. I have no idea what it is.
AI says this, "The object shown in the image is a 0.96 inch I2C OLED display module."
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It's one of the displays you can get with the Troy Radio DDS VFO setup. That one fits nicely behind the channel number window on the front of a Browning Mark 4A transmitter, among others.
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