Here is the info for the 45 amplifer from Sunvalley - SV-S1645D
The composition of the vacuum tubes:12AT7 x1 or 12AX7
12AU7 X 2
45 X 2
274B/5U4G (tube rectifier only)
Output transformer Hashimoto H20-7U.
Choke and Power Transformer 115/230V custom made
Made and Assembled by Sunvalley Japan with 4 x VCAP ODAM (0.1 X 2 + 0.22 X 2)
Available in February 2024 - Only 25 units for the 1st production
Pre-order price $2,475.00 .
After NOV 2023 $2,725 ( included development fee $250 per unit charged by Sunvalley)
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[URL='https://flic.kr/p/2oPzp7X']
WE expect it will take 8-9 months to complete the following processes. Please stay tuned....
- Circuit approval - DONE
- Prototype production - DONE
- Prototype Evaluation - DONE
- Prototype approval - DONE
- Quote Approval - DONE
- Mass production - WIP
- Assembly _ Sept 2023
- Characteristics Verification
- Shipping jAN 2024
- SCHEDULE ARRIVED Vancouver Feb 24, 2024
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2. output power 2W/5.2W 45/45B tube
Hi Victor,
Will it be possible to switch between the Emission Labs 45 and 45B tubes, as previously planned?
Hi Victor, so correct to say no plan to offer one optimized for the 45b for 5.2W?The amp from Suvalley is based on 45 tube only..
You can use 45B but it will work as 45..
I did notice that it appears to be using a 5u4g rectifier, which I like. If you wanted higher plate voltage and more current flowing you could use a 5ar4. After some tinkering around with power supply resistors and cathode resistors you might have something that could work well with the EML 45B. So I hope the design sticks with the 5u4g.Hi Victor, so correct to say no plan to offer one optimized for the 45b for 5.2W?
Here is the info for the 45 amplifer from Sunvalley - SV-S1645D
The composition of the vacuum tubes
45 X 2 (KR or Emission)
What is the current availability situation of New Production 45 tubes?
Google search is not coming up with much, many of the new production offerings available just 5 to 10 years ago appear to have been discontinued and unobtainable new.
It would appear 45 tube has fallen out of favor, perhaps not profitable enough, 😔
KR audio website does not list 45 tube.
Sophia Electric used to offer a few different 45 tube options, now nothing on their website