Mini Amplifier

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How do you make a mini amplifier at home?

I need to amplify the sound from a stethoscope so that it is audible from a distance. Is there any way to do this for under $50 without too much bulk? Any links to a tutorial for a similar project would be greatly appreciated

If you have a stethoscope, remove the sensing end from the ear tubes.
Fit a little electret microphone to the end of the sensing end tube, and connect it to a sensitive amplifier. Do you or someone you know understand enough about electronics to come up with an amplifier suitable for your purpose?
A small battery powered preamplifier could be used, with its output feeding into one channel of a stereo amplifier or similar.
Electret microphones need a voltage source to function.

Find Mini Amplifier On eBay Below:

New 3W Portable Electric Guitar Amplifier Amp Acoustic Guitar Amplifier MINI AMP
New 3W Portable Electric Guitar Amplifier Amp Acoustic Guitar Amplifier MINI AMP
$49.99
Greer Amp Mini Chief 3w Amplifier Head
Greer Amp Mini Chief 3w Amplifier Head
$799.00
Vox MINI3 G2 3 Watt Battery Powered Modeling Combo Guitar Amplifier Classic
Vox MINI3 G2 3 Watt Battery Powered Modeling Combo Guitar Amplifier Classic
$149.99
Headphone Guitar Amplug Amplifier Mini Amp MP3 USB Charge Plexi Sound Best Gift
Headphone Guitar Amplug Amplifier Mini Amp MP3 USB Charge Plexi Sound Best Gift
$14.99
Model I plug Mini Electric Guitar Amplifier Overdrive Protector For IOS Andorid
Model I plug Mini Electric Guitar Amplifier Overdrive Protector For IOS Andorid
$20.89
13W Protable Mini Guitar Headphone Amplifier Clip Guitar Bass Amp Speaker Black
13W Protable Mini Guitar Headphone Amplifier Clip Guitar Bass Amp Speaker Black
$15.99
Honeytone N 10 Guitar Mini Amp Aqua
Honeytone N 10 Guitar Mini Amp Aqua
$14.99
Blackstar FLY 3 FLY3 Mini Guitar Amp Battery Powered Combo Portable Amplifier
Blackstar FLY 3 FLY3 Mini Guitar Amp Battery Powered Combo Portable Amplifier
$70.20
Marshall MS 2 Guitar Mini Amp from Japan
Marshall MS 2 Guitar Mini Amp from Japan
$66.52
Marshall MS 2 Portable Micro Mini Guitar Amplifier w Pocket Clip Tracking NEW
Marshall MS 2 Portable Micro Mini Guitar Amplifier w Pocket Clip Tracking NEW
$57.32
AROMA AG 03M Portable Multifunction Mini Guitar Amplifier Charging 3W 5V Hot
AROMA AG 03M Portable Multifunction Mini Guitar Amplifier Charging 3W 5V Hot
$19.79
JOYO JA 03 Mini Guitar Amplifier Amp Pocket Powerful Acoustic Sound V2M3
JOYO JA 03 Mini Guitar Amplifier Amp Pocket Powerful Acoustic Sound V2M3
$12.77
Peavey Classic 20 Mini Head 20 Watt Tube Guitar Amplifier
Peavey Classic 20 Mini Head 20 Watt Tube Guitar Amplifier
$449.99
Fishman Loudbox Mini 2 Channel 60W Acoustic Guitar Vocal Amplifier New
Fishman Loudbox Mini 2 Channel 60W Acoustic Guitar Vocal Amplifier New
$329.95
Hotone Nano Legacy Heart Attack Mini Amplifier Inspired by Mesa Boogie Rectifier
Hotone Nano Legacy Heart Attack Mini Amplifier Inspired by Mesa Boogie Rectifier
$109.99
Hotone Thunder Bass Nano Legacy Series Mini Amplifier Head Opened Box Mint
Hotone Thunder Bass Nano Legacy Series Mini Amplifier Head Opened Box Mint
$112.50
VOX MINI5 RM CL 5 WATT PORTABLE MAINS BATTERY MODELLING GUITAR AMPLIFIER
VOX MINI5 RM CL 5 WATT PORTABLE MAINS BATTERY MODELLING GUITAR AMPLIFIER
$215.69
VOX MINI3 G2 CL MKII 3 WATT PORTABLE MAINS BATTERY MODELLING GUITAR AMPLIFIER
VOX MINI3 G2 CL MKII 3 WATT PORTABLE MAINS BATTERY MODELLING GUITAR AMPLIFIER
$160.03
Orange Micro Dark Mini Tube Hybrid 20 Watt Guitar Amplifier Head MD20 NEW
Orange Micro Dark Mini Tube Hybrid 20 Watt Guitar Amplifier Head MD20 NEW
$189.00
Danelectro Honeytone N 10 Guitar Mini Amp Aqua
Danelectro Honeytone N 10 Guitar Mini Amp Aqua
$20.75
Mesa Boogie Amplifiers Mini Dual Rectifier Recto Verb 25 Guitar Amp Combo Black
Mesa Boogie Amplifiers Mini Dual Rectifier Recto Verb 25 Guitar Amp Combo Black
$1,549.00
Fishman Loudbox Mini Acoustic Instrument Amplifier PRO LBX 500
Fishman Loudbox Mini Acoustic Instrument Amplifier PRO LBX 500
$329.95
Boss Katana Mini Combo Amplifier
Boss Katana Mini Combo Amplifier
$99.99
Blackstar FLY3 3 watt mini Bluetooth Guitar Amplifier in Purple Paisley
Blackstar FLY3 3 watt mini Bluetooth Guitar Amplifier in Purple Paisley
$94.99
Vitoos Electric Guitar Plug Mini Headphone Amp Amplifier Heavy Rock New K5M6
Vitoos Electric Guitar Plug Mini Headphone Amp Amplifier Heavy Rock New K5M6
$12.44
Blackstar FLY Stereo Pack Battery Pwr Mini Amp and Portable Speakers FLY3PAK
Blackstar FLY Stereo Pack Battery Pwr Mini Amp and Portable Speakers FLY3PAK
$104.99
BOSS Katana Mini 7W 1x4 Portable Battery Powered Guitar Combo Amplifier Amp
BOSS Katana Mini 7W 1x4 Portable Battery Powered Guitar Combo Amplifier Amp
$99.99
Blackstar FLY 3 Watt Mini Micro Electric Practice Guitar Amplifier Battery Amp
Blackstar FLY 3 Watt Mini Micro Electric Practice Guitar Amplifier Battery Amp
$55.00


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