Just custom part number labeled RF transistors made by Hua Gao (HG Semi). Mike KC3OSD
@4X4-RADIO
3 ай бұрын
My 100W Dummy Load will take 200W for @10~15 secs, (on label) Pretty sure yours will, easily long enough to test with up to 10W Drive.
@GeorgeAdams
3 ай бұрын
Put an ice pack on top and it’ll recover more quickly too.
@rpsmith
3 ай бұрын
Thanks! Just ordered one with your discount code!
@PaulTaylor1
3 ай бұрын
I always worry how good the filtering is on these lesser-known amps.
@RobB_VK6ES
3 ай бұрын
Interesting harmonic suppression scheme used here. Just use choose a device and operate it at it's limits of bandwidth😜 I would not consider the lack of auto band switching a minor inconvenience. Far too many Amps have been damaged for want of correct band selection or protection. Band selection using Yaesu BCD is a no brainer to implement, add a $10 microcontroller would easily perform Icom 8V analogue to Yaesu BCD band selection as well as providing SWR and over volt/current protection and you have a solution for 75% of the radios market.
@F_Tim1961
3 ай бұрын
The GS1 - M 5 W qrp Ssb and cw transceiver from Xiegu (predecessor to G 106, which former I own) has a stepped Vout which is specifically designed to be detected and switch the LPFs The voltage tops out at 5 V not 8V so it's not compatible with the Yaesu system. TE. Fidler NzL
@F_Tim1961
3 ай бұрын
THere's a Ukrn factory with a site starting 60dBm that is well worth looking at. Very well engineered amps. mostly use RD16HH and RD100HF mosfets. all based on 14 V supply. they hve a 50 W amp which can be bought either packaged with LPF and case and heat sink or unpackaged you can get it with automatic frequency detection or rotary switch for band selection. Ditto there is a 100 W version of the same thing. The Mitsubishi mosfets will do at least 10 extra than the nameplate rating. 4mW of drive is required. not 4 W just 4milliwatts of RF drive . The 50 W version uses a different input circuit it needs a bit more mojo than 4 milli watt as drive but not a LOT more. Tim Fidler
@jrhusney
3 ай бұрын
I own the 50W packaged amp from 60dBm and I LOVE it. Gets me out far when I’m in the field. My only complaints are: I need bigger batteries and darn it I need to run resonant or upclass my antenna tuner (/s)
@F_Tim1961
3 ай бұрын
@@jrhusney When did you buy it and did you have issues with taxes getting it out o the UKR. I know someone with a 8W class SSB who is interested but he might be worried as things stand at the moment. Does your amp has explicit SWR detection and shut down... I have my suspicion that the reverse watts are dis played on a bargraph of LEDs but it's up to the user to force shut down. As per my comment this amp is basically what's in teh guts of a Hardrock 40 but its all prebuilt and ready to go. Spares a not an issue. Be aware that the RD16HH are end of line they will get harder and harder to buy as time goes on. If you consider the RD16 and RD15 basically the same thing then there is No other Mosfet that will do that job in that power class at 13.5 V My word to wise. Diz at Kits and parts used to handle that part but he has them no longer (business under new owner just now. ) UTSource in China has them at a good price but there may be minimum order value limits there to catch you ...up to you to check out.
@F_Tim1961
3 ай бұрын
@@jrhusney Did you see my list of questions ??:-)) JR ?
@jrhusney
2 ай бұрын
@@F_Tim1961 sorry! I just saw your reply. I purchased on 2024 Feb 17 and the amplifier arrived here in SoCal in early April. No issues with export tariffs or import duty, transaction went smoothly
@jrhusney
2 ай бұрын
@@F_Tim1961 The 60dBm amp is RD16HHF1 based, has no SWR detection and requires a match of 1.5 SWR or better. I take a lot of care to provide it with loads it can handle. One thing I love about this amp is it’s efficiency: I’ve run some rather high duty digital through it and it barely breaks a sweat
@bob_mosavo
3 ай бұрын
Thanks, Matt 👍
@TechMindsOfficial
3 ай бұрын
My pleasure!
@fotografm
3 ай бұрын
Nice video. How about a followup testing linearity revealed by IM distortion and harmonic output ?
@mikewillis1592
3 ай бұрын
Seven minutes before you took it apart Matt. We want to see inside first :) Transistors don't really matter as long as rated for the job. From the hefty biasing, they may be Bipolar, 2SC2290 or similar.
@TechMindsOfficial
3 ай бұрын
It’s called retention :) hope you’re well Mike :)
@norm_sueb122
3 ай бұрын
Thanks for the video!!
@TechMindsOfficial
3 ай бұрын
you're welcome :-)
@RickGreenPhoto
3 ай бұрын
I would love to see this on a Spectrum Analyzer :) You could put an MRF421 in instead and get more power. That would be fun to try..
@syspangylium
2 ай бұрын
I have a somewhat irrelevant question for you. Have you had your hands on the Wolf RS-998 transceiver? 0-750 MHz rx, 0-200 MHz + UHF by frequency conversion tx (locked to HAM bands), 100W output. I'd say it's a base station that can be used as a mobile radio but not really as a portable due to the weight (5.55 kg). It would be nice to see a thorough test of the Wolf.
@cornbread-KO5RN
3 ай бұрын
👋👍
@ethzero
3 ай бұрын
Something to consider for my 705 should I go for an UK _Intermediate_ license in the future 👍 - M7VOK (Of course it would be nice to have a fine control over the power output)
@TechMindsOfficial
3 ай бұрын
You will breeze the Intermediate! :-)
@vu3mes
3 ай бұрын
I have my 705 connected to a Sailor marine amp, 3 watts gives about 200 watts from 160 to 10 meters. Great performance. 73
@mscir
3 ай бұрын
Do any of the SDR radios you've reviewed compete with the better ICOM radios?
@frankENZC
3 ай бұрын
Matt, thanks for the test on this amp. I've been interested in this amp to use with my X6100. I'm wondering how clean is the amp? Maybe someone with a Spectrum Analyzer can test it. 73.
@fatboymotorsport
3 ай бұрын
Hi, what was the SDR radio you used on the PC?
@shanerorko8076
3 ай бұрын
Wow, for not much more, you can get a VK3AMP that has 1000w output with a 5w drive. Built in Australia, not china.
@TechMindsOfficial
3 ай бұрын
In a box, with filtering?
@shanerorko8076
3 ай бұрын
@TechMindsOfficial yea it has filter boards, I can't remember if you have to build the box. You need to buy your own heatsink.
@shanerorko8076
3 ай бұрын
@@TechMindsOfficial He has a Facebook page.
@KQ4JGS
3 ай бұрын
Those are all kits.. I see 2 kw amps, one is 1,999 and the other is 849.
@KQ4JGS
3 ай бұрын
@@shanerorko8076 and the filter boards do not come with the amp kit, you have to buy them.
@N4GW
20 күн бұрын
How would this compare to the PA-100D clones?
@UAvtoDnepropetrovsk
2 ай бұрын
Question: in order to switch CHELEGANCE MX-P150M to TX transmission mode, do you need to close the SEND and GND wires?
@TechMindsOfficial
2 ай бұрын
Yep, that’s correct .
@slappomatthew
3 ай бұрын
Not bad I’d spend the extra bit and get the 60dbm amp with auto band switching and 160/6
@glevideo
3 ай бұрын
If they are custom made transistors I would be cautious about buying this amp because how would I replace a blown transistor?
@thunderbuilt77
3 ай бұрын
Those are most likely rebranded HG 2sc2879 transistors
@tarifalas
Ай бұрын
Hey Matt i am looking to purchase this amplifier, seems like is good for the value. Would you suggest that?
@TechMindsOfficial
Ай бұрын
In my opinion, after testing for a few weeks on air, it works very well with my Hermes Lite 2. Are you in the UK? If so, drop me an email.
@youtubeaccount931
3 ай бұрын
Can it accept a drive of 2mW like from a red pitaya?
@altypeRR
3 ай бұрын
What SDR transceiver is that you are using? Would be interested to know
@TechMindsOfficial
2 ай бұрын
HL2
@N4GW
20 күн бұрын
So it looks like it has LPF filtering
@artakamiraghyan7698
3 ай бұрын
Thank you for the video. Which is better, MX-P150M or XPA125B? 73!
@TechMindsOfficial
3 ай бұрын
It depends if you need an ATU. The MX-P150 is a great amp, and so is the 125b, but the 125b costs more and has an internal ATU. The 125b can also be controlled remotely to change bands (not tune though). Again, the 125b costs more those reasons I believe. Both great amps and I have both.
@artakamiraghyan7698
3 ай бұрын
@@TechMindsOfficialIn my opinion, the MX-P150M will have less heating. Its radiator is located outside and on the up.
@TechMindsOfficial
3 ай бұрын
That’s a very good observation
@Hank_W6IR
3 ай бұрын
For the price they should have included a stand-by switch, BPF for the WARC bands and automatic band switching. I'll pass on this one.
@spareiChan
3 ай бұрын
I agree on the auto-band, considering the LPF is relay controlled it would only require minor reworking to add it. WARC bands usually just use the next band anyway unless it's a real BPF, which this is not, so I find that to be less of an issue considering on an amp having harmonics suppressed is the important part.
@n1kkri
3 ай бұрын
is this amp FCC approved?
@SHTFchef
3 ай бұрын
For a bit more one could buy a Yaesu or Icom 100 watt mobile radio.
@PeddyrCubberley
3 ай бұрын
Too pricey for the power you get. I'd be wanting a 400w amp for that sort of money.
@Scif64
3 ай бұрын
Totally agree. Way over priced.
@4X4-RADIO
3 ай бұрын
You'd be wanting some Crap CB Amp then...!!!
@PeddyrCubberley
3 ай бұрын
@@4X4-RADIO 😂
@xxmrrickxx
3 ай бұрын
The cheapest 400W 12V HF amp is the Ameritron ALS-500 which sells for $1200.
@F_Tim1961
3 ай бұрын
@@xxmrrickxx At that powr you have to use the New Nxp MRF 101 type mosfets which all run on 50-52 V supply line. (there's a 200 Watt Cw nominal version of that part as well, forget the part number the 101 is good for up to 180 Watt out when used in SSB linear mode, as proven by American designs. Tim Fidler
@jeffschall2062
3 ай бұрын
Those are hg transistors
@digiital
3 ай бұрын
Ouch $600 canadian, could be a little more power for that price and autoband
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