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Reviews Categories | Amplifiers: RF Power - HF & HF+6M | Yaesu Quadra VL-1000 Help

Reviews Summary for Yaesu Quadra VL-1000
Yaesu Quadra VL-1000 Reviews: 81 Average rating: 4.4/5 MSRP: $4000
Description: Solid-state, automated 1 kW HF/6m linear amplifier
Product is in production.
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You can write your own review of the Yaesu Quadra VL-1000.

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N1JAO Rating: 5/5 Jun 25, 2016 17:49 Send this review to a friend
1 Year Later  Time owned: more than 12 months
A little over a year of use and still as happy as the day I bought it. Just an amazing amplifier that always works perfectly. Vey grateful to have such a wonderful piece of equipment, and would buy it again without hesitation.
KU4FX Rating: 5/5 Jun 24, 2016 09:08 Send this review to a friend
a great amp plug in and play   Time owned: 0 to 3 months
I have only had this amp for about two weeks in that time I have fallen in love with it. 1 kw all day long and still runs cool. I give it a 5 because it runs flawless hook it up and forget about. I have not used any other transceivers other than my FT450-D and FT991. Just turn your rig on and the amp is ready to go.
K2EQ Rating: 5/5 Jun 17, 2016 08:18 Send this review to a friend
Outstanding amp  Time owned: 6 to 12 months
Six months in daily service now and flawless operation. Using with FTDX 1200, thought I would upgrade to the 3000 or 5000 but cannot find a good reason. Smooth easy operation band to band freq to freq. Panel could have better contrast and be brighter, current settings are dim and dimmer. They make you open up the unit to modify and get 10 and 12 M, why, I havent a clue unless they want to force you to see first hand the wonderful quality of the build. Not close to the cheapest but close to if not the very best. If lightning strikes and makes it toast, I will buy another.
K5WL Rating: 5/5 Mar 22, 2016 15:42 Send this review to a friend
Great if you are careful  Time owned: more than 12 months
I have had this unit for a little over a year now. In that time the resistors have failed twice. The power supply came direct from the Yaesu repair shop where it was fixed at least once. The two times it failed for me were once when the breaker was thrown with the power supply power switch on, and once when the power to the house failed and came back on with the power supply power switch on.

The second time, I had a buck transformer hooked up. I won't forget again, but really it's a design flaw. The price you pay is to do a lengthy repair procedure to get to what are essentially fuses.

Other than that, Mrs. Lincoln, it's an excellent amplifier which has been responsible for some rapid multipliers during contests and some good DX without having to think about it too hard. It suits my ADD style of operating where I just click and play.
VA7OJ Rating: 5/5 Nov 15, 2015 23:08 Send this review to a friend
17 years young!  Time owned: more than 12 months
My faithful old Quadra is still chugging along at 1 kW (occasionally turned down to 500W) after 17 years in my station. The current exciter is an IC-7700.
WD5JOY Rating: 5/5 Sep 13, 2015 08:56 Send this review to a friend
SUPERB VALUE - OPERATIONAL EXCELLENCE!  Time owned: more than 12 months
Hi Guys! I purchased mine USED from a ham in Colorado who quite honestly "needed quick cash" and offered a deal I could not decline! Less than 50% of the "new price"! He had it gone through about eight months back and had all the applicable paperwork to back up his claim. It TRULY was a "once in a lifetime" find!

It took ME a while to become comfortable with the operation and not worry at every turn; the amp is amazing! I learned one step at a time, did not rush, asked questions on the web and in a month I or so I was an "OLD pro"! I have NOT looked back!

Running 550 and 1100 watts (+/- 5%) and this jewel runs COOL and runs PERFECTLY! I could not ask for more!

I AM AMAZED when I see "1-STAR" ratings and one line reasons "why"
the review was so poor. One caught my eye and I cannot help but wonder if the guy purposely goes off in search of "bad equipment"? No way THIS EXAMPLE is TRUE! NO WAY! The guy is fibbing and likely does NOT even have ONE piece of Yaesu equipment unless it is an AM-FM receiver that plays music to calm his soul!

BUNK FROM --------> KG6JYK

Rating: 0/5 ..... April 21, 2003 01:07


Time owned: 0 to 3 months

"Arrived DOA Power supply producing high voltage. So far I have send 6 out of 8 Yaesu products back. All of them failed on arrival."

SORRY "KG6JYK" - but YOU "sir" are blowing smoke! No way so many were 'DOA' unless you deliberately hacked them up! NO WAY! WHY do you have the need to LIE? Did "mamma" beat you when she discovered you lacked the ability to wipe your own "behind"?

Perhaps it because "da' wife" insists SHE make the decisions because YOU make such POOR CHOICES and supposedly but 'DOA' equipment time and time again??


Old Man Donnie

WD9IDV Rating: 5/5 Jan 8, 2015 10:55 Send this review to a friend
14 years and still going!  Time owned: more than 12 months
I am still pleased with Yaesu Quadra amplifier after almost 14 years of ownership. I have not had any issues in the last 14 years since my initial problem with one of the MOSFET MRF 150’s transistors going bad when it was first purchased new.

My only concern is with the LCD display. I wish it was brighter and had better contrast. My Yaesu FT-920 transceiver's display has nice contrast and brightness. The Quadra is definitely less bright and has less contrast compared to the Yaesu FT-920. One would think that Yaesu would have designed the Quadra display to match the FT-920’s display characteristics.

For reference, I have copied my previously published older review and included it below.

“Still going strong with no problems after seven years of operation. I use it almost everyday at 1100 - 1250 watts output. When I operated RTTY and SSTV I always ran it at a kilowatt. When brand new I did have a bad MRF-150 transistor, but Yaesu did replace it and has never shown any problems since being repaired seven years ago.

I run two radios into the amplifier. The first being my "workhorse" the Yaesu FT-920. The second radio is a Kenwood TS-570DG. I use an Ameritron ALB-702 amplifier buffer interface with the Kenwood radio. I have no problems using two radios with the Quadra. Works great and as expected if you read your manual.

Closing Comments:
I love this amplifier. It is very well built. The insides are a work of art. Solid Japanese electronic build quality. The control cables that were included could have been better though.
As to the price, I think it is reasonable. For the level of sophistication, quality, and technical expertise built into this amplifier, it will be money well spent over the course of its life.”

Robert WD9IDV
K9SO Rating: 5/5 Jul 28, 2014 08:14 Send this review to a friend
Failed a second time, this time at 125 volts  Time owned: 6 to 12 months
If it failed for the second time, why would I rate it a FIVE? Because it's really a fine product. But here's what's going on:

Inrush current is limited by the notorious R2A/B/C string of resistors. Once the large value input capacitors are charged, the resistors are bypassed by relay X1. Inrush current is limited by the three 5.6 ohm resistors and the small resistance of the line filter inductors. Call it 20 ohms total. Inrush current is then 15.4 amperes peak with a 220 volt input. During this time the 5 watt R2 resistors are possibly subjected to over 1300 watts of dissipation (peak).
But this is only for a short time (probably no more than 8.3mS) so the resistors can handle that.
The problem is if you apply line voltage when the front panel switch is ON, there is a load on the input capacitors and they take much longer to charge. Relay X1 takes much longer to operate and the resistors are subjected to over-dissipation for a much longer period of time. The result is the obvious failures of one or more of the R2A/B/C resistors.
I have (had) a main breaker switch in the shack which I usually throw when I leave. I seldom turned off the power supply at the front panel switch. Even at 125 volts, it was just a matter of time.
Note that the front panel switch does not disconnect the AC mains. They are always connected unless the rear breaker is thrown. So the solution is simple: just keep the power supply connected to a hot AC main at all times. If you have to unplug it for any reason, make sure the load is not connected and that the front panel switch is OFF when you plug it back in.
It would have been nice if Yaesu had figured this out over the past 10 years of problems, but in the end I have to agree that this is an otherwise incredible product. I doubt that the autotransformers are necessary as long as the AC mains stay connected. They won't hurt, but they won't help with this problem (mine failed even at 125 volts). Note that this can still be an issue if you experience multiple power failures and are caught with the front panel switch in the ON position.

KC1MR Rating: 5/5 Jun 9, 2014 17:55 Send this review to a friend
Love & Marriage !  Time owned: 0 to 3 months
The QUADRA & FTdx 5000d Are plug & play . I have
the latest version of the tuner (7) so i get 1000w
out both with the tuner in or out . I had to remove the cover to get 12 & 10 ,the build quality
is OUTSTANDING with genuine MICROWAVE ASC. MRF 150 s NO shortcuts here . I put in an INRAD 2.4K filter in my FTdx5000D & the results are a much sharper receiver (3.0K is just too wide fer me).
I went with Federal Pacific model SB12N.500F &
Wired it fer 240 volts in with 220 out just to be
on the safe side. The latest Tech Manual wants 200,220 & 232 volts fer the VP-1000 . Latest version is on the internet.
VA3TS Rating: 5/5 May 30, 2014 08:52 Send this review to a friend
Great Amplifier  Time owned: more than 12 months
I've had my Quadra for 4 years, picked it up used from a ham in California. Had the resistor issue at the begining, replaced those and have had no issues since. I live in a rural area and power fluctuations, dropouts can happen anytime especially in winter. So I use a contactor relay to drop out the power to the amp if there is any dropout of the utility power. This one is a 220v relay with a pushbutton. Press the button to pick up the relay and seal it in.(just like a stop/start station) If the power drops out, then the relay drops out too and keeps the poser off till I reset it. You can add surge devices also if you like. I have a similar thing for 120vac to protect the FT5000. The whole shack , used as a complete system is hard to beat, along with the DX-view software and any who come by are impressed with the level of automation. Others my not like that, but I do, this is a winner.
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