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Author Topic: MRF-150's are history?  (Read 2927 times)
W4VR
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« on: November 06, 2012, 07:25:50 AM »

There is a rumor floating around that the MRF-150 is either no longer being manufactured or that it will be discontinued soon.  Does anyone know what is really happening with this device?
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N4ATS
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« Reply #1 on: November 06, 2012, 09:56:33 AM »

I have not heard..I buy the Macom part (MRF-150) from RF Parts in California and buy quite a few repairing the THP and ALS-600 amps frequently. I don't think they are going anywhere soon...
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K8AXW
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« Reply #2 on: November 06, 2012, 11:44:01 AM »

If so they will be replaced by the MRF-151s.
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M0HCN
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Posts: 473




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« Reply #3 on: November 06, 2012, 11:58:34 AM »

Or the VRF151, BLF177, SD29.... Plenty of things that will do just fine in that sort of circuit with few or no changes.

Regards, Dan.
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W4VR
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« Reply #4 on: November 07, 2012, 07:58:11 AM »

Or the VRF151, BLF177, SD29.... Plenty of things that will do just fine in that sort of circuit with few or no changes.

Regards, Dan.

I did not know there are substitutes for the 150.  Good news!
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M0HCN
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« Reply #5 on: November 07, 2012, 10:51:29 AM »

Most of the more modern things are a bit faster, and often manage a little more gain, but all of that can usually be dealt with fairly easily.

Being able to do a strict 1:1 swap will depend quite a bit on the amplifier in question, but it should be a case of fairly minor changes to get the more modern parts to work in more or less any of the standard circuits (Most of which were cribbed straight from old Moto data sheets written by Granburg).

It might mean that the fixers of old gear have to actually think about it, but 150W HF power devices in that form factor will be around for a while yet.

73, Dan.
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WB8VLC
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« Reply #6 on: November 07, 2012, 01:11:42 PM »

I don't see anything on MaComs web page about them going away either
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K9AQ
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Posts: 55




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« Reply #7 on: November 07, 2012, 06:06:41 PM »

The MRF 150 has been in production for so many years that there is huge supply of "surplus" MRF 150's available.  I have had very good success getting them through Ebay from over-sea suppliers and have not had any problems getting them to work well in my EB104 amplifier.  With that said, my next amplifer will use SD2933's, which are now starting to become available at good prices and they provide twice the output as the MRF 150.

K9AQ
Don
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M0HCN
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« Reply #8 on: November 08, 2012, 11:19:15 AM »

LOTS of heat in a small footprint with the 2933, it can be done, but always feels to me like a few watts too far.

Regards, Dan.
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