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

BobWeaver

18

1275

Jun Thu 17, 2021 1:55 am

BobWeaver View the latest post

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

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Robert Lozier

32

1330

Jun Thu 17, 2021 1:53 am

Mike Toon View the latest post

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

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yan_sk

31

2411

Jun Wed 16, 2021 8:33 am

yan_sk View the latest post

No unread posts Attachment(s) LM317 regulator design

mhamiton

12

447

Jun Tue 15, 2021 7:28 pm

OldWireBender View the latest post

No unread posts Attachment(s) ZX81

jsweinrich

7

312

Jun Tue 15, 2021 1:52 am

kx4om View the latest post

No unread posts Attachment(s) Relay circuit question

Tube Radio

17

646

Jun Mon 14, 2021 8:38 pm

Tube Radio View the latest post

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

rocky22

17

557

Jun Sat 12, 2021 2:20 pm

jimsp View the latest post

No unread posts Attachment(s) Flyback Driver Questions

Macrohenry

3

264

Jun Fri 11, 2021 4:42 pm

hi_volt 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

7249

Jun Thu 10, 2021 12:25 am

tym View the latest post

No unread posts Attachment(s) Is this called a machinist adjustable square ?

pauls.ironhorse

5

254

Jun Tue 08, 2021 2:57 pm

pauls.ironhorse View the latest post

No unread posts Attachment(s) Crystal Radio Set

Blustar1

16

6457

Jun Tue 08, 2021 1:46 am

antipode View the latest post

No unread posts Attachment(s) Tube IF transformers

dr pepper

14

931

Jun Mon 07, 2021 3:44 pm

eduardoa View the latest post

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

shockedagain75

8

388

Jun Sat 05, 2021 1:19 pm

ACORNVALVE View the latest post

No unread posts Magnetic loop antenna to regen interface?

Sparks62

2

240

Jun Thu 03, 2021 11:35 pm

Sparks62 View the latest post

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

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Robert Lozier

23

918

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

405

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

2466

May Sun 30, 2021 3:47 pm

928GTS View the latest post

No unread posts PCB hole sizes to be ordered

Macrohenry

6

421

May Sat 29, 2021 4:48 am

Macrohenry View the latest post

Moved topic Moved: An Afternoon with John Rollins, W1FPZ

AE2EA

0

196

May Fri 28, 2021 2:57 pm

AE2EA View the latest post

No unread posts Attachment(s) Constant current power supply

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Tube Radio

23

4226

May Mon 24, 2021 1:56 am

Tube Radio View the latest post

No unread posts 12au7 sw regen.

jimbob

10

880

May Fri 21, 2021 1:17 am

shinkuukan View the latest post

No unread posts Attachment(s) 38 as regenerative detector

allthumbs

12

673

May Thu 20, 2021 6:58 pm

allthumbs View the latest post

No unread posts Attachment(s) Another crystal radio find

Mike Toon

9

643

May Mon 17, 2021 5:02 pm

Rich, W3HWJ View the latest post

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

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whfh99

113

4331

May Sun 16, 2021 1:24 am

whfh99 View the latest post

Moved topic Attachment(s) Moved: 3-channel Am Transmitter 1mhz 3mhz 5mhz $16

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Mike Toon

45

6379

Jun Fri 11, 2021 1:20 am

Mike Toon View the latest post

No unread posts "Hum" noise in transmitter When listening to it on AM radio

sv3ora

9

559

May Sun 09, 2021 9:11 pm

BobWeaver View the latest post

No unread posts Vectronics 1290K, more trouble than it is worth? Help!

TickingMind

4

343

May Fri 07, 2021 5:24 pm

richfair View the latest post

No unread posts Attachment(s) Antique Wireless Assoc. AM tx board

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Rich, W3HWJ

82

6322

May Fri 07, 2021 5:07 am

hwhall View the latest post

No unread posts Toroid question

jimbob

5

433

May Thu 06, 2021 1:45 pm

ACORNVALVE View the latest post

No unread posts Attachment(s) single tube 6gy6 bcb transmitter

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anchorman

25

738

May Wed 05, 2021 6:44 pm

anchorman View the latest post

No unread posts Attachment(s) Wouldn't it be nice

jimbob

9

1195

May Wed 05, 2021 5:04 am

JGTubeamps View the latest post

No unread posts Battery eliminator for A, B, C batteries.

anchorman

3

310

May Sun 02, 2021 11:24 pm

Chas View the latest post

No unread posts Help designing 6sj7/6sn7 input stage for 6v6 PP amplifier

Michiganamps

4

431

May Sat 01, 2021 1:50 am

Mr. Detrola View the latest post

No unread posts Attachment(s) PA output transformer for HiFi application?

classicelectronicsguy

10

458

Apr Fri 30, 2021 4:21 am

BikenSwim View the latest post

No unread posts Attachment(s) Tube Regen

PNeidlinger

10

698

Apr Thu 29, 2021 9:51 am

ACORNVALVE View the latest post

No unread posts Attachment(s) [Solved] Help needed with IF stage oscillation/motorboatin

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szoftveres

27

2954

Apr Wed 28, 2021 10:34 pm

ACORNVALVE View the latest post

No unread posts 12AH8 as regen amplifier working at low voltage

dr pepper

6

406

Apr Wed 28, 2021 2:06 pm

dr pepper View the latest post

No unread posts Attachment(s) 6GY6 transmitter in a computer power supply box

N0BST

14

2050

Apr Tue 27, 2021 12:30 am

anchorman View the latest post

No unread posts Part15 sheet beam transmitter

Audioman

7

783

Apr Sat 24, 2021 4:23 pm

mblack View the latest post

No unread posts Attachment(s) Using turrent boards in HIFI amp

Michiganamps

11

555

Apr Fri 23, 2021 12:52 pm

John Bartley View the latest post

No unread posts Not necessarily antique, but close-scanning

kimsleep100

2

374

Apr Fri 23, 2021 4:19 am

Macrohenry View the latest post

No unread posts Attachment(s) Pine Board to Chassis Conversion

Loose_coupler

4

704

Apr Fri 23, 2021 2:03 am

Scott Madison View the latest post

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

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beast775

24

1106

Apr Thu 22, 2021 8:06 am

beast775 View the latest post

No unread posts Dual 6c4 triode sw

jimbob

0

270

Apr Sun 18, 2021 6:14 pm

jimbob View the latest post

No unread posts Attachment(s) Looking for Project: Have PP 5k Pri Output Xfrmr

Greenhorn

7

568

Apr Fri 16, 2021 6:34 pm

BikenSwim View the latest post

No unread posts A New $5 circuit for an AM Modulator and Generator

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louhaskell

21

1529

Apr Mon 12, 2021 2:02 am

richfair View the latest post

No unread posts Attachment(s) Richfair's am transmitter build

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richfair

39

3057

Apr Wed 07, 2021 8:19 pm

Dare4444 View the latest post

Moved topic Moved: 42IF transformers source

Rich, W3HWJ

4

553

Apr Thu 08, 2021 5:09 pm

Rich, W3HWJ View the latest post

No unread posts TR SWITCH BUILD

HAMmer

2

469

Apr Fri 02, 2021 1:06 pm

HAMmer View the latest post

No unread posts Slope detection of broadcast FM?

928GTS

15

1258

Apr Thu 01, 2021 5:13 pm

mblack View the latest post

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