In this video we fire up the dynamotor, clear out the smoke and shrapnel. Then we test the 400VDC and 750VDC outputs and finally...try out the transmitter!
Enjoy your thoroughness in testing checking the Dynamotor output voltages prior to connecting it to the transmitter. Love the sound of dynamotor's, certainly not efficient ways of producing high-voltage and I'm thankful for transistor power supplies but dam what a great sound. Don't you love the autotune on the ART, troubleshoot tuning by look at the knobs and comparing to the tuning chart. Thanks for taking the time to share
I may be wrong, but the meter when set to the Grid and Anode position is measuring current (in mA) rather than voltage ? The Anode reading you did get was the current due to the bias to the final tubes ? Had you keyed the TX in CW mode (or modulated it in voice) you would have seen the needle move, hopefully to the right spot.
Yes, I've learned more about this TX since making that video. I'll post another with some updates. I was (am) still rather ignorant about much of this rig. Thank you
Hi there. The battery is from A123 and is 100AH. Some other specs: Charge max is 150 amps 180A Rated Continuous Current 2,000A Short Circuit Current 10 Mega Joules! Battery posts: M6-1.0 (1/4" ring terminal) Thanks for watching.
The RF output circuit is not designed to work into 50 ohms. You need to connect a variable capacitor of about 800 pf in parallel with the antenna and ground terminals to create a PI network. Also make sure that knobs with the triangles you line up the top of the triangle (whichever you have to select according to the tuning chart) with the mark on the front panel, otherwise the rotary switch it's connected to, doesn't make contact. The plate and grid on the meter are currents. AM is correct between the CW and MCW plate current range markings on the meter.
thanks very much. You are of course, correct on both counts. I discovered the triangles were not 100% lined up and that made all the difference. I have to get back to this project one of these days! 73
@@Queensryche1 I think the B-29 was the first WW-II Army air aircraft to be equipped with the ART-13, check out the "B-29 Radio Project ART-13" think you'll find it interesting.
Another great video Eugene, keep them coming. W4OSS
Thank you!
Good job !
Enjoy your thoroughness in testing checking the Dynamotor output voltages prior to connecting it to the transmitter. Love the sound of dynamotor's, certainly not efficient ways of producing high-voltage and I'm thankful for transistor power supplies but dam what a great sound. Don't you love the autotune on the ART, troubleshoot tuning by look at the knobs and comparing to the tuning chart. Thanks for taking the time to share
Thanks for the note. Yes love the old fashioned dyno. I plan to show a video of the auto tune doing its thing. I should have shown that
In CW u only get grid current and or plate current with key down
Thank you. I still have a lot to learn about this radio
I may be wrong, but the meter when set to the Grid and Anode position is measuring current (in mA) rather than voltage ? The Anode reading you did get was the current due to the bias to the final tubes ?
Had you keyed the TX in CW mode (or modulated it in voice) you would have seen the needle move, hopefully to the right spot.
Yes, I've learned more about this TX since making that video. I'll post another with some updates. I was (am) still rather ignorant about much of this rig. Thank you
What brand/model etc is the 100 amp battery? Nice set.
Hi there. The battery is from A123 and is 100AH. Some other specs:
Charge max is 150 amps
180A Rated Continuous Current
2,000A Short Circuit Current
10 Mega Joules!
Battery posts: M6-1.0 (1/4" ring terminal)
Thanks for watching.
Plate and grid are current in milliamperes not voltage
YUP! thanks
The RF output circuit is not designed to work into 50 ohms. You need to connect a variable capacitor of about 800 pf in parallel with the antenna and ground terminals to create a PI network. Also make sure that knobs with the triangles you line up the top of the triangle (whichever you have to select according to the tuning chart) with the mark on the front panel, otherwise the rotary switch it's connected to, doesn't make contact. The plate and grid on the meter are currents. AM is correct between the CW and MCW plate current range markings on the meter.
thanks very much. You are of course, correct on both counts. I discovered the triangles were not 100% lined up and that made all the difference. I have to get back to this project one of these days! 73
What era radio?
World War II
@@w2hx I was a comm guy in the Corps. love watching this stuff
@@Queensryche1 I think the B-29 was the first WW-II Army air aircraft to be equipped with the ART-13, check out the "B-29 Radio Project ART-13" think you'll find it interesting.