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No unread posts Attachment(s) Polyakov mixer working for DSB generation?

sv3ora

2

113

Jul Thu 29, 2021 10:16 am

Dare4444 View the latest post

No unread posts Attachment(s) High Voltage Regulator Design Issue

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Jthorusen

32

508

Jul Thu 29, 2021 8:10 am

ACORNVALVE View the latest post

No unread posts Attachment(s) Solid state 1920's speaker amplifier revisited

Tube Radio

10

2367

Jul Thu 29, 2021 7:56 am

ACORNVALVE View the latest post

No unread posts Antennae question

keith1898

7

222

Jul Thu 29, 2021 2:06 am

fifties View the latest post

No unread posts simple formulas for calculating tank circuit values?????????

shockedagain75

10

692

Jul Thu 29, 2021 12:28 am

KK6GM View the latest post

No unread posts Attachment(s) SSB transceiver idea

Dare4444

19

418

Jul Wed 28, 2021 3:41 am

Dare4444 View the latest post

No unread posts Attachment(s) AM with IN4148 double balanced mixer

Dare4444

2

133

Jul Mon 26, 2021 9:19 pm

Dare4444 View the latest post

No unread posts Attachment(s) 38 as regenerative detector

allthumbs

13

1058

Jul Mon 26, 2021 7:56 pm

err ducks View the latest post

No unread posts Attachment(s) Another regen 1D8 tube.

ballroad

3

235

Jul Sat 24, 2021 12:16 am

mrx View the latest post

No unread posts Schematic for regen utilizing an 815 tube?

KA8GEF

3

146

Jul Fri 23, 2021 11:41 pm

N0BST View the latest post

No unread posts Attachment(s) Tube IF transformers

dr pepper

15

1450

Jul Fri 23, 2021 3:21 am

ACORNVALVE View the latest post

No unread posts Variable Frequency Synthesized Source for AM Transmitters

NW2K

1

187

Jul Thu 22, 2021 9:35 pm

Colin Ames View the latest post

No unread posts diy FM superhet without audio ?

aurel

0

120

Jul Thu 22, 2021 2:26 pm

aurel View the latest post

No unread posts Attachment(s) Power ON indicator for battery tube sets.

Robert Lozier

14

660

Jul Wed 21, 2021 6:38 pm

Tube Radio View the latest post

No unread posts 2m receiver ideas

Dare4444

6

585

Jul Wed 21, 2021 2:56 pm

Dare4444 View the latest post

No unread posts Single-end output amp schematic using 211 output tubes?

soloapollo

4

289

Jul Sun 18, 2021 1:04 pm

NW2K View the latest post

No unread posts Attachment(s) Relay circuit question

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Tube Radio

22

1238

Jul Sun 18, 2021 9:17 am

Tube Radio View the latest post

No unread posts Tickler Question

jimbob

3

225

Jul Sat 17, 2021 9:49 pm

Jim Mueller View the latest post

No unread posts Attachment(s) AMT-MW207 525-1605kHz kit built - OK sort of...

Robert Lozier

0

164

Jul Thu 15, 2021 8:47 pm

Robert Lozier View the latest post

No unread posts Attachment(s) Homebuild Reinartz tuner amp.

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beast775

32

1686

Jul Wed 14, 2021 11:44 pm

mrx View the latest post

No unread posts Antenna for QRP pixie kit

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whfh99

21

789

Jul Wed 14, 2021 7:18 pm

whfh99 View the latest post

No unread posts Attachment(s) My recent one tube regen

ballroad

10

773

Jul Wed 14, 2021 12:34 am

ballroad View the latest post

No unread posts input impedance for BNC to opamp

mhamiton

11

489

Jul Tue 13, 2021 12:57 am

Jim Mueller View the latest post

No unread posts Attachment(s) Subharmonic SDR idea with schematic.

Dare4444

5

277

Jul Mon 12, 2021 11:33 pm

Dare4444 View the latest post

No unread posts Attachment(s) Untested SSB SDR Idea. Any feedback or suggestions please

Dare4444

5

175

Jul Sun 11, 2021 11:48 pm

Dare4444 View the latest post

No unread posts Attachment(s) SDR Transceiver Idea with 2n7000

Dare4444

1

144

Jul Sun 11, 2021 8:30 am

Dare4444 View the latest post

No unread posts Attachment(s) ZX81

jsweinrich

9

811

Jul Wed 07, 2021 2:45 am

Ed in SoDak View the latest post

No unread posts Attachment(s) LM386N MK-XI BCB Transmitter

[ Go to pageGo to page: 1 ... 51, 52, 53 ]

35Z5

1046

307544

Jul Tue 06, 2021 8:43 am

Retrotube View the latest post

No unread posts Attachment(s) Loop antenna question

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whfh99

20

891

Jul Sun 04, 2021 7:41 pm

OldWireBender View the latest post

No unread posts Attachment(s) Construction 3 tubes Audion 1923, all concert, patent Audion

[ Go to pageGo to page: 1, 2 ]

yan_sk

38

3547

Jul Sun 04, 2021 3:02 am

mrx View the latest post

No unread posts All tube AM Transmitter

jim campbell

2

486

Jul Thu 01, 2021 4:38 pm

rxradio View the latest post

No unread posts Attachment(s) Crystal Radio Set

Blustar1

17

7085

Jun Tue 29, 2021 6:50 am

Nivagues View the latest post

No unread posts Heathkit White Solid Hookup Wire - What Gauge Was It ?

Frank512

2

250

Jun Tue 29, 2021 1:05 am

Frank512 View the latest post

Moved topic Attachment(s) Moved: Anyone collect Crystal radios?

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whfh99

51

2088

Jul Fri 09, 2021 7:28 am

BobWeaver View the latest post

No unread posts Attachment(s) Home brew 2.5 mH Choke (and Other Considerations) For Regen

krystallo

13

803

Jun Thu 24, 2021 1:04 am

shinkuukan View the latest post

No unread posts Attachment(s) Regen radio coil question

SkyKing

6

627

Jun Wed 23, 2021 4:17 am

Macrohenry View the latest post

No unread posts Attachment(s) Flyback Driver Questions

Macrohenry

10

844

Jun Mon 21, 2021 10:17 pm

ACORNVALVE View the latest post

No unread posts Attachment(s) LM317 regulator design

mhamiton

13

1005

Jun Sat 19, 2021 3:25 am

Jthorusen View the latest post

No unread posts Attachment(s) Update - My Vacuum Tube Frequency Synthesizer

[ Go to pageGo to page: 1, 2 ]

BobWeaver

20

2078

Jun Fri 18, 2021 10:02 pm

mblack View the latest post

No unread posts Attachment(s) This $1 piezo disc ROCKS! as a horn driver.

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Robert Lozier

34

2250

Jun Fri 18, 2021 4:09 am

hwhall View the latest post

No unread posts Attachment(s) converting an old radio into Bluetooth speaker with FM radio

rocky22

17

1207

Jun Sat 12, 2021 2:20 pm

jimsp View the latest post

No unread posts Attachment(s) UPDATE #2: RC-30 Manual television Cabinet Almost done!

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Mr. Highlander

46

8116

Jun Thu 10, 2021 12:25 am

tym View the latest post

Moved topic Attachment(s) Moved: Is this called a machinist adjustable square ?

pauls.ironhorse

5

543

Jun Tue 08, 2021 2:57 pm

pauls.ironhorse View the latest post

No unread posts Magnetic loop antenna to regen interface?

Sparks62

2

393

Jun Thu 03, 2021 11:35 pm

Sparks62 View the latest post

No unread posts New winner for impossible translation in transistor kit?

[ Go to pageGo to page: 1, 2 ]

Robert Lozier

23

1526

Jun Thu 03, 2021 2:47 pm

Robert Lozier View the latest post

No unread posts How To Properly Install a On Off Slide Switche ?

Frank512

8

669

Jun Thu 03, 2021 1:17 pm

ACORNVALVE View the latest post

No unread posts Attachment(s) Assistance requested with a superhet build.

928GTS

16

2873

May Sun 30, 2021 3:47 pm

928GTS View the latest post

No unread posts PCB hole sizes to be ordered

Macrohenry

6

657

May Sat 29, 2021 4:48 am

Macrohenry View the latest post

Moved topic Moved: An Afternoon with John Rollins, W1FPZ

AE2EA

0

298

May Fri 28, 2021 2:57 pm

AE2EA View the latest post

No unread posts Attachment(s) Constant current power supply

[ Go to pageGo to page: 1, 2 ]

Tube Radio

23

4880

May Mon 24, 2021 1:56 am

Tube Radio View the latest post

Post New Topic  [ 3963 topics ]  Go to page 1, 2, 3, 4, 5 ... 80  Next

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