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Reviews Categories | Electronic Component Suppliers | Harbach Electronics Help

Reviews Summary for Harbach Electronics
Harbach Electronics Reviews: 30 Average rating: 5.0/5 MSRP: $(missing—add MSRP)
Description: Great source for amplifier parts and kits
Product is in production.
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W8ER Rating: 5/5 Oct 10, 2017 12:35 Send this review to a friend
Best Product and Service!!  Time owned: more than 12 months
I have installed all of Jeff's available boards in both my Henry 2K Classic and my L4B. All went in easy and performed as described. One additional thing that needs mentioned .. not only are the products good but Jeff's handling of the order is responsive and quick. You won't find a nicer guy to deal with!
N3ZY Rating: 5/5 Jun 19, 2017 17:55 Send this review to a friend
Superb Quality, excellent value  Time owned: 0 to 3 months
I have recently built two kits from Harbach Electronics. The first was the Multikey and the second was a power supply rebuild kit for the Dentron MLA-2500. The circuit boards supplied with these kits are of high quality. They are silk-screened and have plated through holes. For both kits I found that the manual (which you must download from the website) is excellent. It is worth noting here that, in general, it is assumed that you have some minimum level of knowledge. In particular, the power supply rebuild kit is not recommended for beginners and the manual notes this fact. It is also worth noting that these kits are an excellent value. I thought about building both units from scratch using my own design, but they cost only about twice as much as I would have paid for the parts (not counting the custom circuit board, front panels etc), which makes it a no brainer to buy the kit. Highly recommended. Knowing what I know now, I would buy the kits again and it is likely I will buy other kits from this person in the future.
K6QVA Rating: 5/5 Jan 12, 2017 07:48 Send this review to a friend
Heathkit SB-200  Time owned: more than 12 months
Rebuilt a SB200 that was cosmetically near perfect with components all original. Performance was somewhat anemic due to the power supply. Jeff's kit including the "soft start" went together without a hitch. Clear instructions made this upgrade easy even for someone with minimal soldering and mechanical skills. Completed, the amplifier functioned very well with no issues and numerous unsolicited signal compliments. I'm placing an order today with Harbach for a kit(s) to rebuild a Collins 516F-2 power supply. I anticipate the same attention to parts supplied and instruction details. Always a big plus to get it right the first time around. JB
N4UE Rating: 5/5 Aug 28, 2016 15:01 Send this review to a friend
Awesome!  Time owned: 3 to 6 months
I'm refurbing a Heathkit SB-220 and converting an Amp Supply LK-500 into a dedicated 50 MHz amp.
I purchased a few kits from Jeff and the quality of the parts is LOTS better than the OEM stuff, as expected.
I didn't need caps/diodes as I have a large quantity on hand.
Jeff was VERY responsive and allowed me to purchase just the cap board for the LK.
Although I designed my own 'soft key' modules for the amps, I should have just ordered Jeff's.
My new 'go to' guy!

W0EAJ Rating: 4/5 Apr 30, 2016 11:02 Send this review to a friend
good quality, with a couple of direction issues  Time owned: 0 to 3 months
I just installed several mods to a Heath SB-220 for a friend/customer, and while the boards were first class, the directions leave a couple of holes which would be satisfied by a simple picture or diagram. Also, having to "hog out" the holes in the capacitor bank separators is downright UNPROFESSIONAL, and poses a distinct risk to a builder whose tools might not be sharp; i.e. "suggesting" that you should use a knife or razor blade - that kind of thing can get you sued by the wrong kind of person. I ALSO had 2 bad screws with the cap-bank... they had no plating (no biggie), but had bad threads. I used others I had on-hand. I'd also suggest (on the direction sheets AND on the web-page) that the rectifier/metering board be installed AT THE SAME TIME as the capacitor bank - reason? You have to get to the screwheads on the INSIDE of the cap-bank cover, and it's a PITA to loosen it up (and unsolder those wires) all over again. On the soft-start installation - hot glue? Are you kidding me? There is room for 2 standoffs near the outer-rail, 2 small holes (catch the chaff), 4 small screws, and you have a NEAT installation that won't come loose, eventually, AND it keeps the relay vent-ports OFF of the chassis (his warning). Oh, and let's not forget the fan-motor - his directions involve extra hardware - not necessary with the motor WE got - it has threaded standoffs already cast into the FRONT bearing carrier, so simply move the front to the back, back to front, and install the screws so the heads clear the fanblade. NOW you can install it with the original Heath hardware, which is markedly better (I added some extra lube to the bearings, as they didn't have enough). OTHER THAN THAT, good stuff. Just needs a little Q/C followup.
N9XTF Rating: 5/5 Dec 27, 2015 22:53 Send this review to a friend
Electronic Specialties ES4L4-B Soft Start / Soft Key / Bias   Time owned: 0 to 3 months
Two days ago, I removed my etched homebrew bias board and installed the Electronic Specialties bias, soft start, soft key board. This is a wonderfully designed, well thought out and well documented device. As Drake owners, we are extremely lucky to have folks that continue to support our aging radio gear.

The board has a 2.5 second soft start with a slight audible click that notifies the user that the amplifier is ready to operate. This helps take the stress off the power supply components as well as the tube filaments at power up.

The soft key is incorporated reducing the keying voltage and current at the VOX connector. I measured 11VDC at 10ma. This makes my SS rigs ( yes i now have a couple) very happy without the need for a keying interface. One of the best things that i noticed is the 24VDC supplied to the T/R relay is fully rectified. The relay is now much quieter and engages and disengages in the same time frame each transmission. Prior to installing the board, the T/R relay did not engage as quickly and did not disengage the same each time. There is a noticeable difference ( I do not have a millisecond measurement but you can definitely hear the difference).

The bias selection allows the user to to modify the resting current to reduce the wasted heat generated in the tubes.

I have the L4 version, so there is slight variations from the documentation but it still was very easy to install and I feel it is a great addition to a wonderful amplifier.

Doug - N9XTF
VE6ND Rating: 5/5 Jun 14, 2015 20:34 Send this review to a friend
Multi-Key Works Great!  Time owned: 0 to 3 months
I got this interface to use with my TR7 and some other radios. The kit went together perfectly and came with a nice case and can key any amp/radio with this.

I have the second production unit and general questions to Jeff were answered promptly.
Great interface and great company.

Glenn, VE6ND
YV3EDO Rating: 5/5 Feb 13, 2015 10:21 Send this review to a friend
SUPERB  Time owned: 3 to 6 months
Just installed Harbach kit por AC/4 power supply.
product is made with very good quality components and assemblying instructions are straigh forward.

Once turned my old TR-4C on, old "hum" did vanish..

PE1HZG Rating: 5/5 Dec 5, 2013 10:29 Send this review to a friend
Excellent service  Time owned: more than 12 months
Purchased a SB220 a few years back. Purchased a number of Harback upgrades for it: meter board, capacitors, fan, soft start, soft key, etc.The kits are excellent, but there is better news.

For reasons unrelated to the amp of the kit, I have been unable to complete / integrate the upgrades then, got distracted by other things like work and house.

I recently started working on the amp, and unfortunately found that one screw of one of the capacitors had damaged threads. This is a problem - I'm in the Netherlands, we use metric, not imperial screws.

The amp was also missing hardware for the interlock, which I wanted to restore during the renovation.

I sent mail, and Jeff responded immediately and sent replacement screws and the other hardware I did not find. No charge, and that includes no charge for shipping to the Netherlands.

His service is second to none. Highly recommended. Thanks Jeff!

Geert Jan PE1HZG
WA4SKY Rating: 5/5 Nov 23, 2013 22:01 Send this review to a friend
Excellent Product  Time owned: 6 to 12 months
Bought this L4B amp from the original owner who passed away and his son just sold it to me. The amp was seated on a shelf for quite some time and even though was fully operative the PS was running quite hot after several months of use. So, taken into consideration that the amp has never been serviced and it was around forty something years old I decided to replace the caps along with the diodes and resistors.
I got the replacement kit from Harbach Electronics, since is the best deal for your money and pretty straight forward mod.
It took me about two hours to assemble everything and install it. Components are top notch and really easy to follow the instructions step by step.
Now my amp's PS runs way much cooler and I can rest assured that the amp is going to run several more years.
I really recommend this conversion kit to all of those that are looking for a top of the line components with an unbeatable price range.
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