This time doing re-build up only 2A3 single ended amplfier.but using all resistance
are Metal film resistance.as you know 3-4 type of resistace we can get commercial.
one of carbon resistace, wire wound resistance and Metal film resistance.same value
but each material makes very different sound will be get.carbon resistance are good for flat amplifier
even using power amplifier . as you know Metal oxicide film resistance are good for power amplifier.
will be get good bass and mid ,high is very bright sound.
this single amplifier is 2A3 single ended amplfier with 3 stages amplification.
EF86(triode mode) + ECC82/ECC802/12AU7 + 2A3C/B and XE20S ISO Tango.
why drived by triode ?:
I think , you know miller effect ?
any pentodo has miller effect. if drived by pentodo connected as triode ,just would say nothing problem to use for drive to
Triode power.what's meanning ? does not get wide range of freqeucy responce.
probably does not get enough high range frequency responce and does not reach to 60Khz when
drived by pentodo driver.so Triode like 300B,2A3,45 using triode drive.have to drive
low impedance and power drive.
Most good resistance are Skelton in Japan and
Z201 Vishay resistance are very high cost but very good using High End Amplifier's.
used be use carbon resistance all parts of my amplifiers but
I will be back to Matal corting film resistance by Takman Electronics co Japan.
Takman Matal film Resistance(REY) by Takman and web site is Takman Electronics Co Japan show above picture is Takman resistance, very budget resistance but sound is best for me.
to get much low range and mid /high is so sweet sound.REX and REY are for Audio resistance.
and this is Metal film resistance RSN1S TDO resistance
Charactor: Sound is good low ranges and good high range . if your amplifier does not get good low(Good Bass).
please try to replace of all resistance of Metal film resistance. You will be get good Bass and high frequency
tone. famous resistance are "KOA metal film MOS1/2C " "Vishay Metal film Z201" "Skelton Fukushima-Furaba"
"TDO, Solist or Takman Metal film" "Vishay MBB0207-50F" "AMRA" "Rikyu RO-25CFK"
"Vishay RN65D" "Takman RLF" "Tokyo Koon denpa RD" "Nikkohm solid resistance RP" "Alfa Electronics FLCX"
"Vishay VSR" "Takman REY" etc etc.
so recently I like sound of "Takman REY" and "Takman RSN1S" to get good bass from
my single ended Amplifiers.Nikkohm RP are good too.
Takman Resistance Co Japan
Nikkohm Matal Resistanceuse for High End Audio and RF
so Resistance change sound of your Amplifiers.
probably the carbon resitance are good for pre-amplifier and some parts in power supply circuit.
how about you ? please try to use different resistance into your amplifier D.I.Y
sound like above ,this sound just mid high is getting strong cause of digital camera microphone character
45/2A3 Compatible Single Ended Amplifier M type
2A3/45 Compatible Single Ended Amplifier M type
please use Audio Out put transformer capability is 20W single ended and
Universal type transformer 2.5K, 3.5K and 5K ohm.output impedance are 8 and 4 ohms.
frequency response is 10Hz to 90 Khz +/- 0.5 dB. if does not use this kind of transformer
can not get enough tone of 2A3 and 45 NoS.so very important this components are.
2A3/45/71A Single Ended Amplifier in Chile Jan 2013 Speaker are Lowther