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

Jthorusen

13

143

Jul Sat 24, 2021 12:01 pm

ACORNVALVE View the latest post

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

ballroad

3

176

Jul Sat 24, 2021 12:16 am

mrx View the latest post

No unread posts Schematic for regen utilizing an 815 tube?

KA8GEF

3

72

Jul Fri 23, 2021 11:41 pm

N0BST View the latest post

No unread posts Attachment(s) SSB transceiver idea

Dare4444

10

194

Jul Fri 23, 2021 5:17 am

Dare4444 View the latest post

No unread posts Attachment(s) Tube IF transformers

dr pepper

15

1344

Jul Fri 23, 2021 3:21 am

ACORNVALVE View the latest post

No unread posts Variable Frequency Synthesized Source for AM Transmitters

NW2K

1

126

Jul Thu 22, 2021 9:35 pm

Colin Ames View the latest post

No unread posts diy FM superhet without audio ?

aurel

0

59

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

597

Jul Wed 21, 2021 6:38 pm

Tube Radio View the latest post

No unread posts 2m receiver ideas

Dare4444

6

539

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

244

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

1150

Jul Sun 18, 2021 9:17 am

Tube Radio View the latest post

No unread posts Tickler Question

jimbob

3

206

Jul Sat 17, 2021 9:49 pm

Jim Mueller View the latest post

No unread posts Antennae question

keith1898

2

173

Jul Fri 16, 2021 9:11 pm

keith1898 View the latest post

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

Robert Lozier

0

151

Jul Thu 15, 2021 8:47 pm

Robert Lozier View the latest post

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

[ Go to pageGo to page: 1, 2 ]

beast775

32

1595

Jul Wed 14, 2021 11:44 pm

mrx View the latest post

No unread posts Antenna for QRP pixie kit

[ Go to pageGo to page: 1, 2 ]

whfh99

21

719

Jul Wed 14, 2021 7:18 pm

whfh99 View the latest post

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

ballroad

10

728

Jul Wed 14, 2021 12:34 am

ballroad View the latest post

No unread posts input impedance for BNC to opamp

mhamiton

11

440

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

251

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

149

Jul Sun 11, 2021 11:48 pm

Dare4444 View the latest post

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

Dare4444

1

129

Jul Sun 11, 2021 8:30 am

Dare4444 View the latest post

No unread posts Attachment(s) ZX81

jsweinrich

9

761

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

306332

Jul Tue 06, 2021 8:43 am

Retrotube View the latest post

No unread posts Attachment(s) Loop antenna question

[ Go to pageGo to page: 1, 2 ]

whfh99

20

816

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

3369

Jul Sun 04, 2021 3:02 am

mrx View the latest post

No unread posts All tube AM Transmitter

jim campbell

2

457

Jul Thu 01, 2021 4:38 pm

rxradio View the latest post

No unread posts Attachment(s) Crystal Radio Set

Blustar1

17

7019

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

228

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

1910

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

740

Jun Thu 24, 2021 1:04 am

shinkuukan View the latest post

No unread posts Attachment(s) Regen radio coil question

SkyKing

6

599

Jun Wed 23, 2021 4:17 am

Macrohenry View the latest post

No unread posts Attachment(s) Flyback Driver Questions

Macrohenry

10

791

Jun Mon 21, 2021 10:17 pm

ACORNVALVE View the latest post

No unread posts Attachment(s) LM317 regulator design

mhamiton

13

947

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

1987

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.

[ Go to pageGo to page: 1, 2 ]

Robert Lozier

34

2137

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

1106

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!

[ Go to pageGo to page: 1, 2, 3 ]

Mr. Highlander

46

7989

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

526

Jun Tue 08, 2021 2:57 pm

pauls.ironhorse View the latest post

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

shockedagain75

8

608

Jun Sat 05, 2021 1:19 pm

ACORNVALVE View the latest post

No unread posts Magnetic loop antenna to regen interface?

Sparks62

2

374

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

1448

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

628

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

2813

May Sun 30, 2021 3:47 pm

928GTS View the latest post

No unread posts PCB hole sizes to be ordered

Macrohenry

6

626

May Sat 29, 2021 4:48 am

Macrohenry View the latest post

Moved topic Moved: An Afternoon with John Rollins, W1FPZ

AE2EA

0

290

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

4759

May Mon 24, 2021 1:56 am

Tube Radio View the latest post

No unread posts 12au7 sw regen.

jimbob

10

1107

May Fri 21, 2021 1:17 am

shinkuukan View the latest post

No unread posts Attachment(s) 38 as regenerative detector

allthumbs

12

972

May Thu 20, 2021 6:58 pm

allthumbs View the latest post

No unread posts Attachment(s) Another crystal radio find

Mike Toon

9

911

May Mon 17, 2021 5:02 pm

Rich, W3HWJ View the latest post

No unread posts Attachment(s) First time crystal radio build

[ Go to pageGo to page: 1 ... 4, 5, 6 ]

whfh99

113

5613

May Sun 16, 2021 1:24 am

whfh99 View the latest post

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