<div dir="ltr"><div>Low gain... hence using a regenerative receiver so that you get gain on your gain on your gain....until you're getting transistor-like gain numbers.<br><br></div>Also a great way to make an oscillator.<br><br><a href="http://www.vk2zay.net/article/40">http://www.vk2zay.net/article/40</a><br><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Nov 21, 2017 at 11:03 AM, Colin Isenman <span dir="ltr"><<a href="mailto:cisenman@hotmail.com" target="_blank">cisenman@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





<div>



<div link="blue" vlink="#954F72" lang="EN-NZ">
<div class="m_3470361816920061553x_WordSection1">
<p class="m_3470361816920061553x_MsoNormal">So, it looks like a pretty poor amplifier and there must be a cheaper way of generating 2^nd harmonic distortion!</p>
<p class="m_3470361816920061553x_MsoNormal"> </p>
<p class="m_3470361816920061553x_MsoNormal">Interesting though . . .thanks for the links</p>
<p class="m_3470361816920061553x_MsoNormal"> </p>
<p class="m_3470361816920061553x_MsoNormal">Regards<br>
Colin</p>
<p class="m_3470361816920061553x_MsoNormal"> </p>
</div>
<hr style="display:inline-block;width:98%">
<div id="m_3470361816920061553x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Chchrobotics <<a href="mailto:chchrobotics-bounces@lists.ourshack.com" target="_blank">chchrobotics-bounces@lists.<wbr>ourshack.com</a>> on behalf of Volker Kuhlmann <<a href="mailto:list0570@paradise.net.nz" target="_blank">list0570@paradise.net.nz</a>><br>
<b>Sent:</b> Tuesday, November 21, 2017 10:23:59 AM<br>
<b>To:</b> Christchurch Robotics<br>
<b>Subject:</b> [chbot] New valve</font>
<div> </div>
</div>
</div><div><div class="h5">
<font size="2"><span style="font-size:10pt">
<div class="m_3470361816920061553PlainText">Anyone playing with valves? The ones with heating filament, lots of<br>
volts and even more heat?<br>
<br>
Seems like for the first time in decades someone has developed a new<br>
model, for audio enthusiasts.<br>
<a href="https://www.heise.de/make/meldung/NuTube-Projekt-mit-DesignSpark-PCB-3890567.html" target="_blank">https://www.heise.de/make/<wbr>meldung/NuTube-Projekt-mit-<wbr>DesignSpark-PCB-3890567.html</a><br>
<br>
Anode 5 - 80V, gain 5, cathode 0.7V (< 20mA?) - it's a modified VFD.<br>
<br>
datasheet, Korg model 6P1<br>
<a href="http://docs-europe.electrocomponents.com/webdocs/15db/0900766b815db1b5.pdf" target="_blank">http://docs-europe.<wbr>electrocomponents.com/webdocs/<wbr>15db/0900766b815db1b5.pdf</a><br>
(Nothing on their website <a href="http://korg.com" target="_blank">korg.com</a>)<br>
<br>
Available from RS for about 36EUR.<br>
<br>
Reference project:<br>
<a href="https://www.rs-online.com/designspark/design-of-a-korg-nutube-amplifier-part-1-tube-basics" target="_blank">https://www.rs-online.com/<wbr>designspark/design-of-a-korg-<wbr>nutube-amplifier-part-1-tube-<wbr>basics</a><br>
<br>
Volker<br>
<br>
-- <br>
Volker Kuhlmann<br>
<a href="http://volker.top.geek.nz/" target="_blank">http://volker.top.geek.nz/</a>    <wbr>  Please do not CC list postings to me.<br>
<br>
______________________________<wbr>_________________<br>
Chchrobotics mailing list <a href="mailto:Chchrobotics@lists.ourshack.com" target="_blank">Chchrobotics@lists.ourshack.<wbr>com</a><br>
<a href="https://lists.ourshack.com/mailman/listinfo/chchrobotics" target="_blank">https://lists.ourshack.com/<wbr>mailman/listinfo/chchrobotics</a><br>
Mail Archives: <a href="http://lists.ourshack.com/pipermail/chchrobotics/" target="_blank">http://lists.ourshack.com/<wbr>pipermail/chchrobotics/</a><br>
Meetings usually 3rd Monday each month. See <a href="http://kiwibots.org" target="_blank">http://kiwibots.org</a> for venue, directions and dates.<br>
When replying, please edit your Subject line to reflect new subjects.</div>
</span></font>
</div></div></div>

<br>______________________________<wbr>_________________<br>
Chchrobotics mailing list <a href="mailto:Chchrobotics@lists.ourshack.com">Chchrobotics@lists.ourshack.<wbr>com</a><br>
<a href="https://lists.ourshack.com/mailman/listinfo/chchrobotics" rel="noreferrer" target="_blank">https://lists.ourshack.com/<wbr>mailman/listinfo/chchrobotics</a><br>
Mail Archives: <a href="http://lists.ourshack.com/pipermail/chchrobotics/" rel="noreferrer" target="_blank">http://lists.ourshack.com/<wbr>pipermail/chchrobotics/</a><br>
Meetings usually 3rd Monday each month. See <a href="http://kiwibots.org" rel="noreferrer" target="_blank">http://kiwibots.org</a> for venue, directions and dates.<br>
When replying, please edit your Subject line to reflect new subjects.<br></blockquote></div><br></div>