|
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 Summary for DF4ZS RF speech processors |
|
Reviews: 7
|
Average rating: 4.7/5
|
MSRP: $65-130
|
|
Description: Increase average SSB power of radios without RF speech processing by up to 9 db without excessive distortions; smallest model fits into a microphone; make IC-706 or FT-100 sound like with a 400 W amplifier
|
|
Product is in production.
|
|
More info: http://jwm.de/afu/index0.htm
|
|
Email Subscription
You are not subscribed to this review.
Subscribe!
My Subscriptions
Subscriptions Help
|
You can
write your own review of the DF4ZS RF speech processors.
|
XV4TUJ
|
Rating: 5/5
|
Jan 12, 2011 19:04
|
Send this review to a friend
|
|
Great punch through QRM
|
Time owned: 0 to 3 months
|
I received the Mini Type E for christmas. This miniature circuit is specially tailored for the FT-817 and should be a breeze to install in the hand mike. However I had to hook it to my FT-100 and Turner +3B desk mike. Once I understood the documentation, installation was quite straightforward. I had to fight some RF feedback coming from the +9V line of the FT-100 but easily solved the issue.
On the first evening I had four DX, all telling me I had a great audio. I was told that it was pleasant to hear (thanks to the Turner+3B) and coming through the european QRM with ease (something new).
Stock setting for the RF Clipper are perhaps conservative but fit my needs. Better intelligibility but keeping a natural voice.
Definitely a great deal if you don't need fancy bargraphs and front side buttons to play with and worsen your audio on the fly...
|
|
ON4CCU
|
Rating: 5/5
|
Dec 16, 2010 07:22
|
Send this review to a friend
|
|
Significant difference
|
Time owned: 0 to 3 months
|
I bought this processor recently to improve the average output power of my FT-817, which I felt was rather low.
Joachim offered to do the mod for me, at no extra charge. I sent him my microphone and got it back a little over a week later. Excellent service, original parts were in a small plastic bag should I ever wish to bring the thing back in its original state...
Does it work? Yes, there's a visible improvement in "talk power" (on the meter), it certainly makes a difference in QRP DX! A US station I was working last weekend on 15m reported that my signal was 54 (with 5w into a vertical), but I did sound much louder than his s-meter was indicating. Switching off the compressor brought my signal down to his noise level and very difficult to copy...
Just make sure you keep an eye on the mic gain...mine is at 40%, anything above doesn't provide any more signal improvement, but makes your audio sound harsh and aggressive.
|
|
PE1JLJ
|
Rating: 5/5
|
Aug 6, 2006 00:49
|
Send this review to a friend
|
|
cool, worthwhile to get processor for your MH-31
|
Time owned: more than 12 months
|
after paying,the PCB got lost in the mail and Joachim sent me another one.
The voice characteristics can be adjusted a little bit with a different condensator if you like, at the front. The speech processor gives quite some "punch" and you'll have to watch the ALC at first not to overdrive you set.
I found it very peasing to work with; compared to original mikes, it indeed gives you quite a few more contacts.
Thumbs UP !
|
|
G4ZRZ
|
Rating: 3/5
|
Jul 8, 2004 12:40
|
Send this review to a friend
|
|
OK but not with supplied mic element
|
Time owned: 3 to 6 months
|
I've had one of these for a few months now. I have to say that it really helps to increase signal strength. However the downside is that audio quality just isn't very good.
To fit the unit you are required to remove the stock element and fit a small electret element. The claim is that this gives much better sounding audio. It doesn't. The new element has far too much treble and has a edgy sound. After processing this is even worse. At first I thought it was just my unit but after listening to the sound comparisons on the FT817 yahoo group I can see that it's the same for others (who seem happy with the sound).
On SSB much of the harshness isn't apparent but on FM it's awful even without the processor turned on. I've tried adjusting the mic gain but it's no good. Before I did this mod I was always receiving complements about my FM audio with the stock mike, not any more.
I'd love to hear what this unit sounds like with say a Heil HC5 as the element or even with the stock mike element but I'm about to convert my microphone back and try a W4RT one big punch.
|
|
DL6XAZ
|
Rating: 5/5
|
Jul 8, 2004 08:31
|
Send this review to a friend
|
|
excellent
|
Time owned: 6 to 12 months
|
Ordered and installed on unit in the MH31 Yaesu mike for FT817 - the result was simply amazing! Reports indicated at least one more S-units and a very clear modulation.
Based on this positive experience I bought another one for the FT857, improved version, and the results are the same.
Highly recommended for especially QRP equipment!
Service and delivery, documentation and support far above standard!
vy73 Fred DL6XAZ
|
|
WB6UQA
|
Rating: 5/5
|
Dec 3, 2002 21:53
|
Send this review to a friend
|
|
Alot of punch for A 706
|
Time owned: 0 to 3 months
|
I ordered this miniature RF prossesor from Germany.I was worried it wouldn't drive my Icom 706,but I was wrong.I do not have to close talk my mike anymore,pleanty of punch.It will fit in any mike case,about half the size of A book of matches.I get very good audio reports when I talk 9 or 10 inches away.For $63 it delivers alot of bang for the buck.
73's Gary
|
|
NO9E
|
Rating: 5/5
|
Oct 10, 2002 10:50
|
Send this review to a friend
|
|
Good punch at bargain price
|
Time owned: 0 to 3 months
|
|
I ordered a minature speech processor from DF4ZS. It came in about 2 weeks. The unit generates a 455 KHz SSB signal, clips it, and converts back. Amazing size for what it does. It effectively makes a signal of cheap radios (like IC706, FT-100) sound like with 400 W amplifiers at a fraction of cost and labor.
|
|
If you have any questions, problems, or suggestions about Reviews,
please email your Reviews Manager.
|
|
|
|
|
