- Amateur Radio (Ham Radio) Community

Call Search

New to Ham Radio?
My Profile

Friends Remembered
Survey Question

DX Cluster Spots

Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement

Reviews Categories | Amplifiers: RF Power - HF & HF+6M | Alpha 374A Help

Reviews Summary for Alpha 374A
Alpha 374A Reviews: 16 Average rating: 4.6/5 MSRP: $3600.00
Description: ALPHA Legacy Amp.
2 - 8874's
Product is not in production.
More info:
Email Subscription
You are not subscribed to this review.

My Subscriptions
Subscriptions Help

You can write your own review of the Alpha 374A.

Page 1 of 2 —>

KE4AMQ Rating: 5/5 Feb 26, 2019 19:15 Send this review to a friend
great classic amp  Time owned: more than 12 months
I am amp poor, I have a alpha 87a, a couple commanders a 1250 and a 2500. two 811h's both are new and a mla 2500 and a heathkit sb221. But i must say the alpha 374a is a great classic amp the 8874's are very very hard to find so i dont abuse the amp, run it at like 800 watts which is more then enough.Mine is wired for 240 v and has about 2400 volts on the plate with less the 10 mils for the 800 out with 20 watts drive. Always get great reports on my signal. These thing are built like tanks and the 3cx400a7 are rugid tubes lord knows I tuned mine improperly many times with no damage to the tubes or amplifier.
KD8IGK Rating: 5/5 Dec 28, 2014 23:35 Send this review to a friend
Nice Amp - Auto Band Pass is great!  Time owned: 0 to 3 months
I just pick up a used Alpha 374A amp that had been upgraded to two 3CPX800A7 tubes by Dick Byrd N4UQ. It was in very good condition and a good buy considering it had only 20 hrs of use after upgraded which was done in March 2012. I am getting a solid 1400-1500 Watts out with about 70 Watts drive. The band pass mode makes it auto tuning for 15, 20, 40, & 80 Meter bands. This Amp cannot be run on 12M but this is not used by me much anyway.
WT5SF Rating: 5/5 Nov 27, 2013 18:44 Send this review to a friend
Fantastic Amplifier  Time owned: more than 12 months
This is one sweet, old amplifier. Alpha made 365 of these and mine was built during the first production run in Jan 1979. I got it from a friend for $600.00. He had recently bought a new ACOM either the first or second year they were at Dayton and the 374A was freed up. It was also butt ugly, having the "sticky paint" front panel that others have described, but it would still do 900 watts out in bandpass mode on 75, so the tubes were still pretty strong and the low power and 10 meter mods were already done. I spent some time cleaning it up, putting a new front panel on it, changing the meter bulbs and the fan and was very lucky as I had another friend who let me have a NOS pair of EIMAC 8874's for, get this - $200 buck total. So for about $950 or so, some elbow grease, good friends, luck and just a bit of tinkering, I basically have a pretty new looking, 110V semi-auto amplifier consistently produces a kilowatt in bandpass on 75 with 100 watts drive AND a set of pretty decent pulls. Using 220v, I've seen 1300 to 1400 watts before on 75 using manual tune. I have considered the 3 tube 8874 mod or the 800A7 mod, but decided to leave it as original as I could. I have owned 2 x SB1000s and an L4B before and all three were great Amps, but the 374A is in a completely different class than either, both in performance and looks. The 8874 is a pretty robust little tube if you don't completely abuse it, but if you are pricing them you're in for real sticker shock - that is if you can find a decent one. From my point of view, that is the only drawback to the 374A. I don't believe that I will ever part with this amp, but hey, I didn't think that I would get divorced either :) Things change, but this old 374A still has plenty of life in it. I wear my Alpha hat proudly.
KR4JA Rating: 5/5 Jun 1, 2013 08:58 Send this review to a friend
Excellent Legacy Amp  Time owned: more than 12 months
I sold my 374 to get the 160M capability of the 374A. I have the 3 tube version, legal out no problem. I run 1100-1200W in all bandpass positions, only use SSB and the grid current is <20ma. This is essentially an Alpha 78 without the vacuum relays, which I neither need nor want. Much easier to repair the 374A if/when ever needed. Should the time come to replace the tubes, I'll have Dick Byrd do the upgrade to 3CPX800A7 tubes. Thought about moving up to an 87A, but why risk the added expense of complicated repairs, when the 374A will look the same on the wattmeter?

I've had many legal limit amps over the years, TT-Ameritron-Heathkit-AmpSupply,Alpha, and the 374A is my favorite amp!!
PY5AJ Rating: 4/5 Sep 22, 2012 18:16 Send this review to a friend
EXCELLENT EQUIPMENT  Time owned: 3 to 6 months
KK7P Rating: 5/5 Nov 24, 2009 12:09 Send this review to a friend
Quiet and Effective  Time owned: 6 to 12 months
I purchased a used Alpha 374A several months ago from the eHam classifieds for use with my K3. The bandpass (no tune) operation was a major attraction. I have had no problems with the Alpha. It easily provides a kilowatt of output with some headroom. I was concerned that the fan noise might be loud, but I find it is a sort of "whhhoossshh" rather than a whine, and is quieter than I expected. Being an SSB operator, I don't find the T/R relay noise too distracting. I wouldn't want to use this with QSK without changing the T/R system, though.
ZL4IV Rating: 5/5 Aug 27, 2009 02:39 Send this review to a friend
A Gem  Time owned: 3 to 6 months
I have many high power amps but this medium power amp from the past is far ahead of it's time. Just like out of the box with a new set of tubes. The low power drive mod done it is a real gem. I thought about adding a third tube but who would notice the signal difference? They are worth the high price for what they deliver and the build quality. If you find one buy it. There is plenty of info around if you have to do any work on it. No tune switching works in quick band changes very well.
N9IND Rating: 5/5 May 18, 2009 03:55 Send this review to a friend
I love Alpha and my 374a  Time owned: more than 12 months
I have had Dentron,Drake and H/K 220 and when i purchased my Alpha 374a from a friend in San Diego,Ca i did not know it had pass band tuning until i opened the box. Man what a Amp.!!! I read the manual and did not realize that anything like this was built in the U.S. of America? This Amp. is built to run with mil. spec Rockwell Collins radios yes better than Collins Amps. I recently sent it to Alhpa in Co. The people at Alpha Radio Products are wonderful people Glenn went thru this amp with a fine tooth comb! When i received it back with the mods. that Glenn had done such as the so-239 conversion on the exciter plug and muffin fan and new tubes and a numerous other things low drive mod. Glenn told me this 374a is one of the better ones he has seen for a while it really is a smooth Amp. and i do not want to leave Molly out she is a real Sweetheart of a person and the other people that i had consulted with was able to help me tremendously on questions i asked. Will i buy another alpha YOU DAMN RIGHT!!! As soon as i save for the 9500 P.S. if you can find a used alpha buy it then You will have THE BEST in my opinion. 73 and God Bless Claude Retired U.S.Army 43 Yrs.
W3RXO Rating: 5/5 Aug 14, 2008 19:30 Send this review to a friend
WOW!!! Another great Alpha.  Time owned: 6 to 12 months
I "fell" into the deal of the century, on a 374A, from a friend, who just wanted to get rid of it. It was too big, too heavy, and all those other complaints, that some fellows have, as they get older. I'll likely have similar complaints, one day. BUT NOT NOW. I got this from my friend for a song (nearly literally), and promptly went to the Alpha website, and bought the replacement faceplate. WOW! Night and day difference, from the original. Performance-wise, it does everything I want it to do. On 80, 40, 20 and 15, I get 1200+ output, on the original tubes, running it on a 117VAC line, and driving it with 40-45 watts from my Drake, when using the "Passband" tuning. I have tuned it up on 17 and 10, but have never done so on any band with passband. And it still does 1200+ output, on passband or tuned. All things considered, I'll be happy to hold on to this one for a LONG, LONG time, at least until I can afford a 9500, or a Prometheus.
NE2I Rating: 5/5 Jul 18, 2005 04:51 Send this review to a friend
super amp for cheap price  Time owned: 0 to 3 months
Barring the sticky paint problem,
The 374a is a solid performer
Alpha now supports these
older amplifiers. They sell new front panels
and switches for most of their legacy amps.
Their support is great
My alpha is getting vacuum relays and a new front panel. I bought the relays from MAX Gain. There
are many web sites that outline the installation.
I moved up from a Dentron. What a upgrade!
Page 1 of 2 —>

If you have any questions, problems, or suggestions about Reviews, please email your Reviews Manager.