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| Topics |
Author |
Replies |
Views |
Last post |
| Announcements |
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Addition to Forum Rules
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Alan Voorhees |
0 |
367 |
Jul Fri 30, 2021 3:38 am
Alan Voorhees
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| Topics |
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simple formulas for calculating tank circuit values?????????
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shockedagain75 |
11 |
767 |
Jul Sat 31, 2021 8:16 am
ACORNVALVE
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 SDR Transceiver Idea with 2n7000
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Dare4444 |
2 |
180 |
Jul Fri 30, 2021 7:36 pm
Dare4444
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SSB transceiver idea
[  Go to page: 1, 2 ]
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Dare4444 |
20 |
496 |
Jul Fri 30, 2021 8:14 am
Dare4444
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High Voltage Regulator Design Issue
[ Go to page: 1, 2, 3 ]
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Jthorusen |
40 |
632 |
Jul Fri 30, 2021 8:11 am
ACORNVALVE
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Polyakov mixer working for DSB generation?
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sv3ora |
6 |
191 |
Jul Fri 30, 2021 5:49 am
KX5JSC
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Antennae question
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keith1898 |
14 |
304 |
Jul Fri 30, 2021 5:38 am
Mike Toon
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Solid state 1920's speaker amplifier revisited
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Tube Radio |
15 |
2462 |
Jul Thu 29, 2021 10:20 pm
Tube Radio
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How To Properly Install a On Off Slide Switche ?
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Frank512 |
9 |
726 |
Jul Thu 29, 2021 4:03 pm
err ducks
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AM with IN4148 double balanced mixer
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Dare4444 |
2 |
169 |
Jul Mon 26, 2021 9:19 pm
Dare4444
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38 as regenerative detector
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allthumbs |
13 |
1080 |
Jul Mon 26, 2021 7:56 pm
err ducks
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Another regen 1D8 tube.
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ballroad |
3 |
255 |
Jul Sat 24, 2021 12:16 am
mrx
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Schematic for regen utilizing an 815 tube?
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KA8GEF |
3 |
168 |
Jul Fri 23, 2021 11:41 pm
N0BST
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Tube IF transformers
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dr pepper |
15 |
1477 |
Jul Fri 23, 2021 3:21 am
ACORNVALVE
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Variable Frequency Synthesized Source for AM Transmitters
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NW2K |
1 |
206 |
Jul Thu 22, 2021 9:35 pm
Colin Ames
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diy FM superhet without audio ?
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aurel |
0 |
132 |
Jul Thu 22, 2021 2:26 pm
aurel
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Power ON indicator for battery tube sets.
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Robert Lozier |
14 |
675 |
Jul Wed 21, 2021 6:38 pm
Tube Radio
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2m receiver ideas
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Dare4444 |
6 |
600 |
Jul Wed 21, 2021 2:56 pm
Dare4444
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Single-end output amp schematic using 211 output tubes?
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soloapollo |
4 |
302 |
Jul Sun 18, 2021 1:04 pm
NW2K
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Relay circuit question
[ Go to page: 1, 2 ]
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Tube Radio |
22 |
1249 |
Jul Sun 18, 2021 9:17 am
Tube Radio
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Tickler Question
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jimbob |
3 |
235 |
Jul Sat 17, 2021 9:49 pm
Jim Mueller
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AMT-MW207 525-1605kHz kit built - OK sort of...
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Robert Lozier |
0 |
171 |
Jul Thu 15, 2021 8:47 pm
Robert Lozier
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Homebuild Reinartz tuner amp.
[ Go to page: 1, 2 ]
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beast775 |
32 |
1743 |
Jul Wed 14, 2021 11:44 pm
mrx
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Antenna for QRP pixie kit
[ Go to page: 1, 2 ]
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whfh99 |
21 |
804 |
Jul Wed 14, 2021 7:18 pm
whfh99
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My recent one tube regen
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ballroad |
10 |
798 |
Jul Wed 14, 2021 12:34 am
ballroad
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input impedance for BNC to opamp
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mhamiton |
11 |
505 |
Jul Tue 13, 2021 12:57 am
Jim Mueller
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Subharmonic SDR idea with schematic.
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Dare4444 |
5 |
287 |
Jul Mon 12, 2021 11:33 pm
Dare4444
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Untested SSB SDR Idea. Any feedback or suggestions please
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Dare4444 |
5 |
181 |
Jul Sun 11, 2021 11:48 pm
Dare4444
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ZX81
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jsweinrich |
9 |
828 |
Jul Wed 07, 2021 2:45 am
Ed in SoDak
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LM386N MK-XI BCB Transmitter
[ Go to page: 1 ... 51, 52, 53 ]
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35Z5 |
1046 |
307829 |
Jul Tue 06, 2021 8:43 am
Retrotube
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Loop antenna question
[ Go to page: 1, 2 ]
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whfh99 |
20 |
943 |
Jul Sun 04, 2021 7:41 pm
OldWireBender
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Construction 3 tubes Audion 1923, all concert, patent Audion
[ Go to page: 1, 2 ]
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yan_sk |
38 |
3596 |
Jul Sun 04, 2021 3:02 am
mrx
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All tube AM Transmitter
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jim campbell |
2 |
491 |
Jul Thu 01, 2021 4:38 pm
rxradio
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Crystal Radio Set
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Blustar1 |
17 |
7118 |
Jun Tue 29, 2021 6:50 am
Nivagues
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Heathkit White Solid Hookup Wire - What Gauge Was It ?
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Frank512 |
2 |
258 |
Jun Tue 29, 2021 1:05 am
Frank512
|
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Moved: Anyone collect Crystal radios?
[ Go to page: 1, 2, 3 ]
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whfh99 |
51 |
2120 |
Jul Fri 09, 2021 7:28 am
BobWeaver
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Home brew 2.5 mH Choke (and Other Considerations) For Regen
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krystallo |
13 |
826 |
Jun Thu 24, 2021 1:04 am
shinkuukan
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Regen radio coil question
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SkyKing |
6 |
642 |
Jun Wed 23, 2021 4:17 am
Macrohenry
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Flyback Driver Questions
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Macrohenry |
10 |
867 |
Jun Mon 21, 2021 10:17 pm
ACORNVALVE
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LM317 regulator design
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mhamiton |
13 |
1029 |
Jun Sat 19, 2021 3:25 am
Jthorusen
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Update - My Vacuum Tube Frequency Synthesizer
[ Go to page: 1, 2 ]
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BobWeaver |
20 |
2116 |
Jun Fri 18, 2021 10:02 pm
mblack
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This $1 piezo disc ROCKS! as a horn driver.
[ Go to page: 1, 2 ]
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Robert Lozier |
34 |
2310 |
Jun Fri 18, 2021 4:09 am
hwhall
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converting an old radio into Bluetooth speaker with FM radio
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rocky22 |
17 |
1226 |
Jun Sat 12, 2021 2:20 pm
jimsp
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UPDATE #2: RC-30 Manual television Cabinet Almost done!
[ Go to page: 1, 2, 3 ]
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Mr. Highlander |
46 |
8172 |
Jun Thu 10, 2021 12:25 am
tym
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Moved: Is this called a machinist adjustable square ?
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pauls.ironhorse |
5 |
551 |
Jun Tue 08, 2021 2:57 pm
pauls.ironhorse
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Magnetic loop antenna to regen interface?
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Sparks62 |
2 |
397 |
Jun Thu 03, 2021 11:35 pm
Sparks62
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New winner for impossible translation in transistor kit?
[ Go to page: 1, 2 ]
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Robert Lozier |
23 |
1545 |
Jun Thu 03, 2021 2:47 pm
Robert Lozier
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Assistance requested with a superhet build.
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928GTS |
16 |
2895 |
May Sun 30, 2021 3:47 pm
928GTS
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PCB hole sizes to be ordered
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Macrohenry |
6 |
679 |
May Sat 29, 2021 4:48 am
Macrohenry
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Moved: An Afternoon with John Rollins, W1FPZ
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AE2EA |
0 |
303 |
May Fri 28, 2021 2:57 pm
AE2EA
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Constant current power supply
[ Go to page: 1, 2 ]
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Tube Radio |
23 |
4924 |
May Mon 24, 2021 1:56 am
Tube Radio
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