Russian germaniums gt308/ gt404 - low HFEs

Igloo · Post by **Igloo** » 10 Jun 2009, 13:56

I'll go search that out.
The peak would definitely show the presence of a shunt resistor so that's out.
The only other factor I can think of is HFE significantly rising with current?
I have a near genetic dislike of being ripped off.
This guy just pushes my buttons with his lying-attack style of defense.

jrod · Post by **jrod** » 10 Jun 2009, 15:21

Igloo wrote:I'll go search that out.
The peak would definitely show the presence of a shunt resistor so that's out.
The only other factor I can think of is HFE significantly rising with current?
I have a near genetic dislike of being ripped off.
This guy just pushes my buttons with his lying-attack style of defense.

Yeah, MartyMart, I believe, really liked them in a Fuzz Face. AFAIK, there is no internal resistor in the 308's. Yeah, that whole experience sucks. I think playon got the same treatment. That's why I am going to move on to another seller.

BTW, Igloo. Did you get my last PM I sent you? I think my PM's may not be reaching their destination sometimes.

playon · Post by **playon** » 10 Jun 2009, 15:39

You guys ought to check out Evita.com in Lithuania, it's a little bit of a hassle to wire the money to them but they are working on getting a paypal account. The transistors are super cheap too.

playon · Post by **playon** » 10 Jun 2009, 15:39

You guys ought to check out Evita.com in Lithuania, it's a little bit of a hassle to wire the money to them but they are working on getting a paypal account. The transistors are super cheap too.

Igloo · Post by **Igloo** » 10 Jun 2009, 15:48

Yeah I have cruised their catalogue. They don't seem to have every 'letter type' for gain range. But hey, those prices!
Have you received your order from them?

playon · Post by **playon** » 10 Jun 2009, 18:27

Igloo wrote:Yeah I have cruised their catalogue. They don't seem to have every 'letter type' for gain range. But hey, those prices!
Have you received your order from them?

But at least they have the datasheets for most of them. I'm out of town but the order should be there when I get back on Friday.

Igloo · Post by **Igloo** » 10 Jun 2009, 22:25

Excellent.
I'd love to hear about the results.

playon · Post by **playon** » 15 Jun 2009, 21:51

Got the order today, I have not tested them yet but the stuff arrived in less than 2 weeks (from Lithuania to the USA) and the order was complete and correct. I mostly bought silicon but did get a small bag of GT404G germaniums which are supposed to be 40-100 hfe, I will check them out.

For the silicons I got some KT3102s for higher gain applications, and for lower-gain types I got some KT3128A, and some of the KT315 series. Looking at the short stubby legs of the KT315G and KT 315A, I think they would be difficult to work with and I'd stay away from that series in the future. These were very cheap so it was an inexpensive education...

140 transistors set me back $25 + a $15 wire transfer fee. If they can get the paypal happening it will be even cheaper.

Igloo · Post by **Igloo** » 16 Jun 2009, 01:15

Excellent.
I emailed them but have not heard back.
Would be curious about the HFEs of the 404s. Did they nominate those values?

playon · Post by **playon** » 16 Jun 2009, 02:21

On the GT404Gs I was just going by the data sheet specs. Will test them when I have time.

jrod · Post by **jrod** » 22 Jun 2009, 20:13

Hey Playon!
Just curious how this GT404 tested?
Thanks!
jrod

playon · Post by **playon** » 22 Jun 2009, 21:02

They tested pretty good, between 65-120 with most being in the 70-100 range. Haven't tried em in a circuit yet.

jrod · Post by **jrod** » 24 Jun 2009, 16:26

Cool! Those should sound really good!

Igloo · Post by **Igloo** » 25 Jun 2009, 06:15

I want to say a big thank you to jrod in this thread.
We did a parts swap and he sent me a killer selection of trannies tp play with. Really helped after the rubbish that Gordelux burned me with.
Thank you buddy!