UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Convert Vintage Valve Radio to Guitar Amp

David G4EBT · 14th Aug 2019, 9:50 am

I constructed a Velleman 'Universal Mono Pre-Amplifier' Kit ‘K1803’ to raise the signal level from an I-phone for the gram input of a Bush AC41 valve radio for my son. It works a treat. Ordinarily, I make little projects such as that myself as I enjoy designing and making little PCB projects, but this kit is so cheap it made no sense to do that.

Might be worth a thought?

Product overview:

Quote:

8-<

This kit has been developed as a pre-module for a number of audio applications, where there is insufficient input signal.
Ideal for use as a microphone pre-amplifier for signal matching of tuner or tape outputs and for level correction.
Adjustable output level.

• Power supply: 10-30VDC / 10mA
• Output impedance: 1Kohm
• Adjustable output level: max. 40dB
• Frequency range: 20Hz to 20kHz ± 3dB
• Max. input signal: 40mV

8-<

End quote.

It's available from several suppliers, but ESR Electronics, who sell the full range of Velleman kits, (and lots more stuff) seem to be cheapest.

£4.32 + £3.50 P&P + VAT:

https://www.esr.co.uk/velleman/k1803.htm

The construction manual & circuit is here:

https://www.esr.co.uk/velleman/k1803.htm

Hope that's of interest.

14th Aug 2019, 9:50 am	#32
David G4EBT Dekatron Join Date: Feb 2003 Location: Cottingham, East Yorkshire, UK. Posts: 5,763	Re: Convert Vintage Valve Radio to Guitar Amp I constructed a Velleman 'Universal Mono Pre-Amplifier' Kit ‘K1803’ to raise the signal level from an I-phone for the gram input of a Bush AC41 valve radio for my son. It works a treat. Ordinarily, I make little projects such as that myself as I enjoy designing and making little PCB projects, but this kit is so cheap it made no sense to do that. Might be worth a thought? Product overview: Quote: 8-< This kit has been developed as a pre-module for a number of audio applications, where there is insufficient input signal. Ideal for use as a microphone pre-amplifier for signal matching of tuner or tape outputs and for level correction. Adjustable output level. • Power supply: 10-30VDC / 10mA • Output impedance: 1Kohm • Adjustable output level: max. 40dB • Frequency range: 20Hz to 20kHz ± 3dB • Max. input signal: 40mV 8-< End quote. It's available from several suppliers, but ESR Electronics, who sell the full range of Velleman kits, (and lots more stuff) seem to be cheapest. £4.32 + £3.50 P&P + VAT: https://www.esr.co.uk/velleman/k1803.htm The construction manual & circuit is here: https://www.esr.co.uk/velleman/k1803.htm Hope that's of interest. __________________ David. BVWS Member. G-QRP Club member 1339.