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Reviews For: Down East Microwave 432-28 ( New 2010 Version )

Category: Transverters

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Review Summary For : Down East Microwave 432-28 ( New 2010 Version )
Reviews: 3MSRP: 379 Kit or Assembled $499
Description:
432MHz transverter, 25w output, <0.7dBNF, 28MHz IF.
( 60 watt version also available )
Product is in production
More Info: http://www.downeastmicrowave.com/
# last 180 days Avg. Rating last 180 days Total reviews Avg. overall rating
0034.7
SM3LGO Rating: 2020-06-06
Nice transverter for the price Time Owned: more than 12 months.
I own both the 144-28 and the 432-28 transverters since about 5 years. Both work as advertised. I ordered them ready built from DEM, and my only complaint is that the quality control seems so-so. In the 144-28. there was a loose screw inside the enclosure. Also, there was a short between a line in the circuit board and the shield over the crystal owen which made it intermittently stop working. The 432-28 was incorrectly wired, the wiring to two PINs of the AUX connector had been swaped out of order. Easily fixed though. Setting this aside, both work as advertised.
M0AFJ Rating: 2019-01-02
Great performance Time Owned: 3 to 6 months.
Pleased I bit the bullit and ordered the Demi Transverter. Solidly built quality product at a reasonable price. Seems very sensitive and dives my amplifier to full power without any difficulty.
Make sure you specify your connectors, drive level and your switching requirements.
Great company to deal with
N9LB Rating: 2011-09-27
Great Performance, Reasonable Price! Time Owned: more than 12 months.
I purchased one of the first "2010 Version" Down East Microwave Incorporated ( DEMI ) model 432-28 transverters about a year ago. I did this based on my previous experiences with DEMI's new 144-28 and 222-28 transverters. During this first year of ownership I've used the 432-28 in all the ARRL VHF/UHF contests and in the Spring and Fall Sprints.

I'm using a FLEX Radio HF transceiver that has a low level transverter input and output. Instructions for interfacing to other types and brands of transceivers are included in the manual.

- - - Be sure to order your transverter pre-configured for your exact model transceiver! - - -

How does the DEMI 432-28 transverter perform?

The power output shows no RF compression or clipping when driven to full rated output and the receive sensitivity seems excellent.
( BTW, I don't use an external receive pre-amp )

I have six high power HDTV UHF stations 10 - 15 air miles away in Madison, WI and another four high power HDTV stations about 45 miles away in Rockford, IL. I've detected no interference with the antenna aimed in any direction.

Also no issues with local 440 FM repeaters or commercial 2-Way Radio.

On-Air reports have been very complimentary - probably due to the transparency of the transverter and the fine audio quality associated with the FLEX Radio HF transceiver.
( Be sure not to overdrive it! )

After a five minute warm-up there is no noticeable drift in frequency.

With a single 18 element yagi at 60 feet, I can work similarly equipped stations 100 to 200 miles away. When there is tropospheric enhancement distances can be much greater.

When ordering any transverter, make sure you clearly communicate the type of HF transceiver that you will be using with it and the method of inter-connection and control.

Hope to work you on the Ultra-Highs!

Lloyd N9LB