E180F V EF184

Dagwood · 10th August 2011, 06:27 AM

Hi

I have a little headphone amp running Mullard EF80's or EF184 (much quieter).
Last night I found a nice pair of E180F tubes in my stock, would these be a straight swap

seems the only pin out difference is that the screen is connected to Grid 3, all other specs seem close.

Any thoughts would be great, as I would like to build another as a preamp and have heard the E180F is a good choice

Cheers

azazello · 05:05 PM

Great choice! E180F-Phillips-gold pins - is my favorite pretube for my SE-s 2A3 and 300B! /it sister is amazing E186F/.

Dagwood · 10th August 2011, 06:14 PM

Thanks azazello

Do you think the screen connection to G3 will be an issue?

azazello · 10th August 2011, 07:28 PM

http://frank.pocnet.net/sheets/009/e/E180F.pdf

Dagwood · 11th August 2011, 01:39 AM

Thanks for the link

Sorry, I must have not been clear?

I have had a look at the datasheet and noticed that the screen on the E180F is connected to Grid 3 ( pin 8 ) and wondered if it will work instead of a EF184? the EF184 has the screen on pin 6. Can these be swapped over???

Cheers

alexg · 11th August 2011, 02:47 AM

Quote:

Originally Posted by azazello

Great choice! E180F-Phillips-gold pins - is my favorite pretube for my SE-s 2A3 and 300B! /it sister is amazing E186F/.

Can you share your schematic of the E180F and 2a3? I have a pair of Philips 6688 with gold pins.

Blaireau · 06:23 AM

You can't directly replace EF184 with E180F, whithout rewiring the screen connection. -pin 9 from EF184 to pin 8 from E180F -pin 8 from EF184 to pin 9 from E180F -Cut wire from pin 6 (EF184) to ground, and leave te connection free. By the way, the Russian equivalent to E180F is 6J9P (6ж9п). These are very unexpensive and very good tubes. It's worth a trial.

Dagwood · 11th August 2011, 07:48 AM

Hi Blaireau

Thanks for that, It might pay for me to just use these on the preamp rather than trying to mod the headphone amp.

I guess my question was also aimed at the compatibility and people thoughts of the E180F?

I just had a look on Ebay for the 6J9P, your right at only $1.50 USD a piece!! Might try a few.

Cheers

azazello · 04:03 PM

Quote:

Originally Posted by Blaireau

You can't directly replace EF184 with E180F, whithout rewiring the screen connection. -pin 9 from EF184 to pin 8 from E180F -pin 8 from EF184 to pin 9 from E180F -Cut wire from pin 6 (EF184) to ground, and leave te connection free. By the way, the Russian equivalent to E180F is 6J9P (6ж9п). These are very unexpensive and very good tubes. It's worth a trial.

They are the same....., but sounding is some different, I have and I don't like 6J9P /close is 6J11P/.
Alexg, This is my SE 2A3-RCA. Plate resistor E180F now is 13 kohm /not 33 kohm/ and upper
resistor 12 kohm now is 3 kohm/:
https://picasaweb.google.com/1095707...13827582447474

Blaireau · 11th August 2011, 04:28 PM

6j9p are excellent when triode wired in an SRPP stage. To be true, I don't use "normal" stages in amplifiers anymore. SRPP is really the best architecture among all.

10th August 2011, 06:27 AM	#1
Dagwood diyAudio Member Join Date: Feb 2010 Location: North of Auckland	E180F V EF184 Hi I have a little headphone amp running Mullard EF80's or EF184 (much quieter). Last night I found a nice pair of E180F tubes in my stock, would these be a straight swap seems the only pin out difference is that the screen is connected to Grid 3, all other specs seem close. Any thoughts would be great, as I would like to build another as a preamp and have heard the E180F is a good choice Cheers __________________ If you keep digging in the garden of failure you will eventually find success

10th August 2011, 05:01 PM	#2
azazello diyAudio Member Join Date: Aug 2008 Location: Bulgaria	Great choice! E180F-Phillips-gold pins - is my favorite pretube for my SE-s 2A3 and 300B! /it sister is amazing E186F/. Last edited by azazello; 10th August 2011 at 05:05 PM.

10th August 2011, 06:14 PM	#3
Dagwood diyAudio Member Join Date: Feb 2010 Location: North of Auckland	Thanks azazello Do you think the screen connection to G3 will be an issue? __________________ If you keep digging in the garden of failure you will eventually find success

11th August 2011, 01:39 AM	#5
Dagwood diyAudio Member Join Date: Feb 2010 Location: North of Auckland	Thanks for the link Sorry, I must have not been clear? I have had a look at the datasheet and noticed that the screen on the E180F is connected to Grid 3 ( pin 8 ) and wondered if it will work instead of a EF184? the EF184 has the screen on pin 6. Can these be swapped over??? Cheers __________________ If you keep digging in the garden of failure you will eventually find success

11th August 2011, 06:20 AM	#7
Blaireau diyAudio Member Join Date: May 2011 Location: Dijon	You can't directly replace EF184 with E180F, whithout rewiring the screen connection. -pin 9 from EF184 to pin 8 from E180F -pin 8 from EF184 to pin 9 from E180F -Cut wire from pin 6 (EF184) to ground, and leave te connection free. By the way, the Russian equivalent to E180F is 6J9P (6ж9п). These are very unexpensive and very good tubes. It's worth a trial. __________________ http://constructions.f6fkn.com Last edited by Blaireau; 11th August 2011 at 06:23 AM.

10th August 2011, 07:28 PM	#4
azazello diyAudio Member Join Date: Aug 2008 Location: Bulgaria	http://frank.pocnet.net/sheets/009/e/E180F.pdf

11th August 2011, 07:48 AM	#8
Dagwood diyAudio Member Join Date: Feb 2010 Location: North of Auckland	Hi Blaireau Thanks for that, It might pay for me to just use these on the preamp rather than trying to mod the headphone amp. I guess my question was also aimed at the compatibility and people thoughts of the E180F? I just had a look on Ebay for the 6J9P, your right at only $1.50 USD a piece!! Might try a few. Cheers __________________ If you keep digging in the garden of failure you will eventually find success

11th August 2011, 04:28 PM	#10
Blaireau diyAudio Member Join Date: May 2011 Location: Dijon	6j9p are excellent when triode wired in an SRPP stage. To be true, I don't use "normal" stages in amplifiers anymore. SRPP is really the best architecture among all. __________________ http://constructions.f6fkn.com

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