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June 19, 2018, 09:50:48 PM *
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 on: June 17, 2018, 01:45:19 PM 
Started by KL7OF - Last post by KL7OF
well done Steve
TNX..send me an email pse.....

 on: June 17, 2018, 11:54:53 AM 
Started by Opcom - Last post by Opcom
Now for a radiotherapy clinic!

 on: June 17, 2018, 07:30:40 AM 
Started by i5kap - Last post by pe1mph
Greetings to the community of 10m AMPHONE, 03/06/2018 thanks Tom VA1SEA after 2 years finally the jump of the Atlantic Ocean in 10m AM, very strong signal but for a short time, my power in use was 40W carrier , the 04/06/2018, 3 QSOs with north American stations in SSB with 100W of power, but it was surprising in this day activity in 10m AM, I had the good fortune to meet many as 28 European stations including Henk PE1MPH of which I had already read some of his topic but I had never in the contract in radio, today with Henk we already feel once again on the radio and via email, I think that our radio activities hast a good evolution in Europe, 73 Franco I5KAP

Hi, hi Franco,
There a lot of stations who know, how nice qso-ing on Ten meter in AM can be....
A pity, not often good conditions!
I sent an email to my AM lovers, 'to keep an eye on' 29000 khz.
Perhaps they hear once/suddenly a station calling in AM!!

Yes I had already fantastic qso's on Ten/15 mtrs with several countries.
With only +/- 10 Watt comming out my old Yaesu FT 901 connect with a piece of wire!

I hope Ten (and 15) mtrs. goes soon open again. Smiley


Henk, pe1mph
Dokkum, The Netherlands

 on: June 16, 2018, 10:46:46 PM 
Started by KL7OF - Last post by KA7WOC
well done Steve

 on: June 16, 2018, 11:25:44 AM 
Started by W1KSZ - Last post by W1KSZ
The nice clean Ranger II I got was clean for a reason ...
lack of use due to a bad Function Switch.

So, looking for a replacement, either from an older Ranger
or the newer Ranger II.

If you still have the leads attached all the better.

Tnx es 73, Dick, W1KSZ

 on: June 15, 2018, 08:22:11 PM 
Started by KL7OF - Last post by KL7OF
The FET arrived today and I mounted it on the board...WE HAVE IGNITION CAPTAIN ! It works good..... I have to put the bike back together and test ride but it started and ran...Thanks ...Steve

 on: June 15, 2018, 06:10:23 PM 
Started by wy3d - Last post by PA0NVD
Hi Jim
Quite similar that EL36 circuit. , but I advice using a FET, not a transistor. These are more prone to shift in operation point and distorsion due to RF rectification.

 on: June 15, 2018, 05:27:23 PM 
Started by W1KSZ - Last post by W1KSZ
Looking for a Hi-Res pdf of the Ranger II Schematic. Something I
can print out on "D" size (11 X 17) paper.

So far, all I find on the Web is the original Ranger schematic.

Except for the addition of 6 Meters, I am not sure what other
changes were made.

I picked up a nice looking (except for the two holes some mis-guided
soul drilled in the front panel) Ranger II. It has some mods done
to it, along with the wire to nowhere !!
One end hangs in mid-air, the other goes to the Red light (XMT) on
the front panel.

Most of the tubes test OK, even those marked EF Johnson. Before I
try the "smoke" test, I need to see what other "features" have
been added.

Tnx for any leads,

73, Dick, W1KSZ

 on: June 15, 2018, 04:57:47 PM 
Started by wy3d - Last post by DMOD
Does anyone have any experience with using a Darlington pair in a circuit to modulate an AM transmitter without the use of a mod transformer.

Did you mean to say, "Series Modulation...?"

It seems you said Shunt Modulator then went on to describe a series modulator.

Phil - AC0OB

 on: June 15, 2018, 04:35:28 PM 
Started by wy3d - Last post by WD5JKO

I like that grid/cathode modulation circuit. It reminded me of an application on the net about how to get good audio from an el-36. I attach the link and sketch here.


I have been wanting to try that on a KT-77...


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