eHam.net - Amateur Radio (Ham Radio) Community

Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
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
About eHam.net


Reviews Categories | Antenna parts, accessories, incl. baluns, hardware, etc. | Diamond BU-50 1:1 Balun (1.7 - 40MHz) Help


Reviews Summary for Diamond BU-50 1:1 Balun (1.7 - 40MHz)
Diamond BU-50 1:1 Balun (1.7 - 40MHz) Reviews: 3 Average rating: 3.7/5 MSRP: $(missing—add MSRP)
Description: - 1.7 to 40MHz
- 50 Ohms
- VSWR:Less than 1.5:1
- Max.power rating:1.2kW(PEP)
- Connector:MJ (SO-239)
Product is not in production.
More info: http://www.diamond-ant.co.jp/english/amateur/antenna/ante_2base/ante_base7.html
Email Subscription
You are not subscribed to this review.

Subscribe!
My Subscriptions
Subscriptions Help

You can write your own review of the Diamond BU-50 1:1 Balun (1.7 - 40MHz).

DL2DBY Rating: 2/5 Oct 29, 2010 11:47 Send this review to a friend
Not really sitisfying  Time owned: more than 12 months
I have mine hang up for about 2 Years or so. When using an amplifier at 1000 Watts he started changing SWR at 80 rapidly with transmission time.

At the end I did blow this device up and have to build a new one which really does 1 kW.

Assumption is that there was some moisture in the case which created high internal losses.

But ok, a lot of things which are rated 1.2 or 1.5 kW don't really withstand the power.

They are almost good on 500 W or 750 W, but putting a real demand on them should be prevented.

73

Michael
 
DL5KW Rating: 4/5 Jul 14, 2010 02:29 Send this review to a friend
Fine for 40M  Time owned: 6 to 12 months
I use two BU-50 Baluns, and I am quite satisfied.

Advantages:

1)My baluns have a galvanic connection between the two arms. It is not just a ferrit core over a koax cable. So the danger of static voltage is lower, which could destroy the first transistor of your receiver.

2) The balun is quite small, so the weight on a free antenna wire is small.

Drawbacks:

1) Do not use this balun for the 75,80 and 160 meter-band. There are better baluns with lower SWRs.

2)There is no real cover over the screw connection of your koax-cable. I needed extra tape, to get this jack-connection waterproof.

73 de DL5KW, Paul



 
VK2WTT Rating: 5/5 Apr 2, 2010 04:03 Send this review to a friend
Has worked perfectly so far.  Time owned: more than 12 months
I bought three of these several years ago, and have had absolutely no trouble with them.

The build quality is very good, and they seem to be able to withstand prolonged use in the Australian summer.

Power handling is 1.2KW (PEP), but I have only used mine up to 100W PEP at this stage.

So far, so good!
 


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